From Wikipedia, the free encyclopedia
Natural number
Cardinal six hundred
Ordinal 600th (six hundredth)
Factorization 23 × 3 × 52
Divisors 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 25, 30, 40, 50, 60, 75, 100, 120, 150, 200, 300, 600
Greek numeral Χ´
Roman numeral DC
Binary 10010110002
Ternary 2110203
Senary 24406
Octal 11308
Duodecimal 42012
Hexadecimal 25816
Armenian Ո
Hebrew ת"ר / ם
Babylonian cuneiform 𒌋
Egyptian hieroglyph 𓍧
600 (six hundred ) is the
natural number following
599 and preceding
601 .
Mathematical properties
Six hundred is a
composite number , an
abundant number , a
pronic number
[1] and a
Harshad number .
Credit and cars
In the United States, a
credit score of 600 or below is considered poor, limiting available credit at a normal interest rate
NASCAR runs 600 advertised miles in the
Coca-Cola 600 , its longest race
The
Fiat 600 is a car, the
SEAT 600 its Spanish version
Integers from 601 to 699
600s
601 = prime number,
centered pentagonal number
[2]
602 = 2 × 7 × 43,
nontotient ,
number of cubes of edge length 1 required to make a hollow cube of edge length 11 , area code for
Phoenix, AZ along with
480 and
623
603 = 32 × 67,
Harshad number ,
Riordan number ,
area code for
New Hampshire
604 = 22 × 151,
nontotient , totient sum for first 44 integers, area code for southwestern British Columbia (Lower Mainland, Fraser Valley, Sunshine Coast and Sea to Sky)
605 = 5 × 112 ,
Harshad number ,
sum of the nontriangular numbers between the two successive
triangular numbers 55 and 66,
number of non-isomorphic set-systems of weight 9
606 = 2 × 3 × 101,
sphenic number , sum of six consecutive primes (89 + 97 + 101 + 103 + 107 + 109),
admirable number
607 – prime number, sum of three consecutive primes (197 + 199 + 211),
Mertens function (607) = 0,
balanced prime ,
[3] strictly non-palindromic number,
[4]
Mersenne prime exponent
608 = 25 × 19,
Mertens function (608) = 0,
nontotient ,
happy number ,
number of regions formed by drawing the line segments connecting any two of the perimeter points of a 3 times 4 grid of squares
[5]
609 = 3 × 7 × 29,
sphenic number ,
strobogrammatic number
[6]
610s
610 = 2 × 5 × 61, sphenic number,
Fibonacci number ,
[7]
Markov number ,
[8] also a kind of
telephone wall socket used in
Australia
611 = 13 × 47, sum of the three standard board sizes in Go (92 + 132 + 192 ), the
611th
tribonacci number is prime
612 = 22 × 32 × 17,
Harshad number , Zuckerman number (sequence
A007602 in the
OEIS ),
untouchable number , area code for
Minneapolis, MN
613 = prime number, first number of
prime triple (p , p + 4, p + 6), middle number of
sexy prime triple (p − 6, p , p + 6). Geometrical numbers:
Centered square number with 18 per side,
circular number of 21 with a square grid and 27 using a triangular grid. Also 17-gonal. Hypotenuse of a right triangle with integral sides, these being 35 and 612. Partitioning: 613 partitions of 47 into non-factor primes, 613 non-squashing partitions into distinct parts of the number 54. Squares: Sum of squares of two consecutive integers, 17 and 18. Additional properties: a
lucky number , index of prime Lucas number.
[9]
614 = 2 × 307,
nontotient ,
2-Knödel number . According to Rabbi
Emil Fackenheim , the number of Commandments in Judaism should be 614 rather than the traditional 613.
615 = 3 × 5 × 41,
sphenic number
616 = 23 × 7 × 11,
Padovan number , balanced number,
[10] an alternative value for the
Number of the Beast (more commonly accepted to be
666 )
617 = prime number, sum of five consecutive primes (109 + 113 + 127 + 131 + 137),
Chen prime ,
Eisenstein prime with no imaginary part, number of compositions of 17 into distinct parts,
[11]
prime index prime , index of prime Lucas number
[9]
Area code 617 , a telephone area code covering the metropolitan Boston area
618 = 2 × 3 × 103,
sphenic number ,
admirable number
619 = prime number,
strobogrammatic prime ,
[12]
alternating factorial
[13]
620s
620 = 22 × 5 × 31, sum of four consecutive primes (149 + 151 + 157 + 163), sum of eight consecutive primes (61 + 67 + 71 + 73 + 79 + 83 + 89 + 97), the sum of the first 620 primes is itself prime
[14]
621 = 33 × 23, Harshad number, the discriminant of a totally real cubic field
[15]
622 = 2 × 311,
nontotient , Fine number,
Fine's sequence (or Fine numbers): number of relations of valence >= 1 on an n-set; also number of ordered rooted trees with n edges having root of even degree , it is also the standard diameter of modern road
bicycle wheels (622 mm, from hook bead to hook bead)
623 = 7 × 89, number of partitions of 23 into an even number of parts
[16]
624 = 24 × 3 × 13 =
J4 (5) ,
[17] sum of a twin prime (311 + 313), Harshad number, Zuckerman number
625 = 252 = 54 , sum of seven consecutive primes (73 + 79 + 83 + 89 + 97 + 101 + 103),
centered octagonal number ,
[18] 1-
automorphic number ,
Friedman number since 625 = 56−2 ,
[19] one of the two three-digit numbers when squared or raised to a higher power that end in the same three digits, the other being
376
626 = 2 × 313,
nontotient ,
2-Knödel number ,
Stitch 's experiment number
627 = 3 × 11 × 19, sphenic number, number of
integer partitions of 20,
[20]
Smith number
[21]
628 = 22 × 157,
nontotient , totient sum for first 45 integers
629 = 17 × 37,
highly cototient number ,
[22]
Harshad number , number of diagonals in a 37-gon
[23]
630s
630 = 2 × 32 × 5 × 7, sum of six consecutive primes (97 + 101 + 103 + 107 + 109 + 113),
triangular number ,
hexagonal number ,
[24]
sparsely totient number ,
[25] Harshad number, balanced number
[26]
631 =
Cuban prime number,
centered triangular number ,
[27]
centered hexagonal number ,
[28] Chen prime, lazy caterer number (sequence
A000124 in the
OEIS )
632 = 23 × 79,
refactorable number , number of 13-bead necklaces with 2 colors
[29]
633 = 3 × 211, sum of three consecutive primes (199 + 211 + 223),
Blum integer ; also, in the title of the movie
633 Squadron
634 = 2 × 317,
nontotient , Smith number
[21]
635 = 5 × 127, sum of nine consecutive primes (53 + 59 + 61 + 67 + 71 + 73 + 79 + 83 + 89), Mertens function(635) = 0, number of compositions of 13 into pairwise relatively prime parts
[30]
"Project 635", the Irtysh River diversion project in China involving a
dam and a
canal
636 = 22 × 3 × 53, sum of ten consecutive primes (43 + 47 + 53 + 59 + 61 + 67 + 71 + 73 + 79 + 83), Smith number,
[21] Mertens function(636) = 0
637 = 72 × 13, Mertens function(637) = 0,
decagonal number
[31]
638 = 2 × 11 × 29, sphenic number, sum of four consecutive primes (151 + 157 + 163 + 167),
nontotient ,
centered heptagonal number
[32]
639 = 32 × 71, sum of the first twenty primes, also
ISO 639 is the
ISO 's standard for codes for the representation of
languages
640s
640 = 27 × 5,
Harshad number ,
refactorable number , hexadecagonal number,
[33] number of 1's in all partitions of 24 into odd parts,
[34] number of acres in a square mile
641 = prime number,
Sophie Germain prime ,
[35] factor of
4294967297 (the smallest nonprime
Fermat number ), Chen prime, Eisenstein prime with no imaginary part,
Proth prime
[36]
642 = 2 × 3 × 107 = 14 + 24 + 54 ,
[37]
sphenic number ,
admirable number
643 = prime number, largest prime factor of 123456
644 = 22 × 7 × 23,
nontotient ,
Perrin number ,
[38] Harshad number, common
umask ,
admirable number
645 = 3 × 5 × 43, sphenic number,
octagonal number , Smith number,
[21]
Fermat pseudoprime to base 2,
[39] Harshad number
646 = 2 × 17 × 19, sphenic number, also
ISO 646 is the ISO's standard for international 7-bit variants of
ASCII , number of permutations of length 7 without rising or falling successions
[40]
647 = prime number, sum of five consecutive primes (113 + 127 + 131 + 137 + 139), Chen prime, Eisenstein prime with no imaginary part, 3647 - 2647 is prime
[41]
648 = 23 × 34 =
A331452(7, 1) ,
[5] Harshad number,
Achilles number , area of a square with diagonal 36
[42]
649 = 11 × 59,
Blum integer
650s
650 = 2 × 52 × 13,
primitive abundant number ,
[43]
square pyramidal number ,
[44] pronic number,
[1]
nontotient , totient sum for first 46 integers; (other fields) the number of seats in the
House of Commons of the United Kingdom ,
admirable number
651 = 3 × 7 × 31, sphenic number,
pentagonal number ,
[45]
nonagonal number
[46]
652 = 22 × 163, maximal number of regions by drawing 26 circles
[47]
653 = prime number, Sophie Germain prime,
[35] balanced prime,
[3] Chen prime, Eisenstein prime with no imaginary part
654 = 2 × 3 × 109, sphenic number,
nontotient , Smith number,
[21]
admirable number
655 = 5 × 131, number of toothpicks after 20 stages in a three-dimensional grid
[48]
656 = 24 × 41 =
⌊
3
16
2
16
⌋
{\displaystyle \lfloor {\frac {3^{16}}{2^{16}}}\rfloor }
,
[49] in
Judaism , 656 is the number of times that
Jerusalem is mentioned in the
Hebrew Bible or
Old Testament
657 = 32 × 73, the largest known number not of the form a 2 +s with s a
semiprime
658 = 2 × 7 × 47,
sphenic number ,
untouchable number
659 = prime number, Sophie Germain prime,
[35] sum of seven consecutive primes (79 + 83 + 89 + 97 + 101 + 103 + 107), Chen prime, Mertens function sets new low of −10 which stands until 661, highly cototient number,
[22] Eisenstein prime with no imaginary part, strictly non-palindromic number
[4]
660s
660 = 22 × 3 × 5 × 11
Sum of four consecutive primes (157 + 163 + 167 + 173)
Sum of six consecutive primes (101 + 103 + 107 + 109 + 113 + 127)
Sum of eight consecutive primes (67 + 71 + 73 + 79 + 83 + 89 + 97 + 101)
Sparsely totient number
[25]
Sum of 11th row when writing the natural numbers as a triangle.
[50]
Harshad number .
661 = prime number
Sum of three consecutive primes (211 + 223 + 227)
Mertens function sets new low of −11 which stands until 665
Pentagram number of the form
5
n
2
−
5
n
+
1
{\displaystyle 5n^{2}-5n+1}
Hexagram number of the form
6
n
2
−
6
n
+
1
{\displaystyle 6n^{2}-6n+1}
i.e. a
star number
662 = 2 × 331,
nontotient , member of
Mian–Chowla sequence
[51]
663 = 3 × 13 × 17,
sphenic number , Smith number
[21]
664 = 23 × 83,
refactorable number , number of knapsack partitions of 33
[52]
665 = 5 × 7 × 19,
sphenic number , Mertens function sets new low of −12 which stands until 1105, number of diagonals in a 38-gon
[23]
666 = 2 × 32 × 37,
Harshad number ,
repdigit
667 = 23 × 29, lazy caterer number (sequence
A000124 in the
OEIS )
668 = 22 × 167,
nontotient
669 = 3 × 223,
blum integer
670s
670 = 2 × 5 × 67, sphenic number,
octahedral number ,
[53]
nontotient
671 = 11 × 61. This number is the
magic constant of n ×n normal
magic square and
n -queens problem for n = 11.
672 = 25 × 3 × 7,
harmonic divisor number ,
[54] Zuckerman number,
admirable number
673 = prime number, Proth prime
[36]
674 = 2 × 337,
nontotient ,
2-Knödel number
675 = 33 × 52 ,
Achilles number
676 = 22 × 132 = 262 , palindromic square
677 = prime number, Chen prime, Eisenstein prime with no imaginary part, number of non-isomorphic self-dual multiset partitions of weight 10
[55]
678 = 2 × 3 × 113, sphenic number,
nontotient , number of surface points of an octahedron with side length 13,
[56]
admirable number
679 = 7 × 97, sum of three consecutive primes (223 + 227 + 229), sum of nine consecutive primes (59 + 61 + 67 + 71 + 73 + 79 + 83 + 89 + 97), smallest number of multiplicative persistence 5
[57]
680s
680 = 23 × 5 × 17,
tetrahedral number ,
[58]
nontotient
681 = 3 × 227, centered pentagonal number
[2]
682 = 2 × 11 × 31, sphenic number, sum of four consecutive primes (163 + 167 + 173 + 179), sum of ten consecutive primes (47 + 53 + 59 + 61 + 67 + 71 + 73 + 79 + 83 + 89), number of moves to solve the Norwegian puzzle
strikketoy
[59]
683 = prime number, Sophie Germain prime,
[35] sum of five consecutive primes (127 + 131 + 137 + 139 + 149), Chen prime, Eisenstein prime with no imaginary part,
Wagstaff prime
[60]
684 = 22 × 32 × 19, Harshad number, number of graphical forest partitions of 32
[61]
685 = 5 × 137, centered square number
[62]
686 = 2 × 73 ,
nontotient , number of multigraphs on infinite set of nodes with 7 edges
[63]
687 = 3 × 229, 687 days to orbit the Sun (
Mars )
D-number
[64]
688 = 24 × 43, Friedman number since 688 = 8 × 86,
[19] 2-
automorphic number
[65]
689 = 13 × 53, sum of three consecutive primes (227 + 229 + 233), sum of seven consecutive primes (83 + 89 + 97 + 101 + 103 + 107 + 109).
Strobogrammatic number
[66]
690s
690 = 2 × 3 × 5 × 23, sum of six consecutive primes (103 + 107 + 109 + 113 + 127 + 131), sparsely totient number,
[25] Smith number,
[21] Harshad number
ISO 690 is the ISO's standard for bibliographic references
691 = prime number, (negative) numerator of the
Bernoulli number B 12 = -691/2730.
Ramanujan's tau function τ and the
divisor function σ11 are related by the remarkable congruence τ(n ) ≡ σ11 (n ) (mod 691).
In number theory, 691 is a "marker" (similar to the radioactive markers in biology): whenever it appears in a computation, one can be sure that Bernoulli numbers are involved.
692 = 22 × 173, number of partitions of 48 into powers of 2
[67]
693 = 32 × 7 × 11, triangular matchstick number,
[68] the number of sections in
Ludwig Wittgenstein 's
Philosophical Investigations .
694 = 2 × 347, centered triangular number,
[27]
nontotient , smallest pandigital number in base 5.
[69]
695 = 5 × 139, 695!! + 2 is prime.
[70]
696 = 23 × 3 × 29, sum of eight consecutive primes (71 + 73 + 79 + 83 + 89 + 97 + 101 + 103), totient sum for first 47 integers, trails of length 9 on honeycomb lattice
[71]
697 = 17 × 41,
cake number ; the number of sides of Colorado
[72]
698 = 2 × 349,
nontotient , sum of squares of two primes
[73]
699 = 3 × 233,
D-number
[64]
References
^
a
b
Sloane, N. J. A. (ed.).
"Sequence A002378 (Oblong (or promic, pronic, or heteromecic) numbers)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
a
b
Sloane, N. J. A. (ed.).
"Sequence A005891 (Centered pentagonal numbers)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
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b
Sloane, N. J. A. (ed.).
"Sequence A006562 (Balanced primes)" . The
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b
Sloane, N. J. A. (ed.).
"Sequence A016038 (Strictly non-palindromic numbers)" . The
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^
a
b
Sloane, N. J. A. (ed.).
"Sequence A331452 (Triangle read by rows: T(n,m) (n >= m >= 1) = number of regions (or cells) formed by drawing the line segments connecting any two of the 2*(m+n) perimeter points of an m X n grid of squares)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A000787 (Strobogrammatic numbers)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A000045 (Fibonacci numbers)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A002559 (Markoff (or Markov) numbers)" . The
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^
a
b
Sloane, N. J. A. (ed.).
"Sequence A001606 (Indices of prime Lucas numbers)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A020492 (Balanced numbers: numbers k such that phi(k) (A000010) divides sigma(k) (A000203))" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A032020 (Number of compositions (ordered partitions) of n into distinct parts)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation. Retrieved 2022-05-24 .
^
Sloane, N. J. A. (ed.).
"Sequence A007597 (Strobogrammatic primes)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A005165 (Alternating factorials)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
OEIS :
A013916
^
Sloane, N. J. A. (ed.).
"Sequence A006832 (Discriminants of totally real cubic fields)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A027187 (Number of partitions of n into an even number of parts)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A059377 (Jordan function J_4(n))" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A016754 (Odd squares: a(n) = (2n+1)^2. Also centered octagonal numbers)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
a
b
Sloane, N. J. A. (ed.).
"Sequence A036057 (Friedman numbers)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A000041 (a(n) = number of partitions of n)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
a
b
c
d
e
f
g
Sloane, N. J. A. (ed.).
"Sequence A006753 (Smith numbers)" . The
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^
a
b
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"Sequence A100827 (Highly cototient numbers)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
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b
Sloane, N. J. A. (ed.).
"Sequence A000096 (a(n) = n*(n+3)/2)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A000384 (Hexagonal numbers)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
a
b
c
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"Sequence A036913 (Sparsely totient numbers)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
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"Sequence A020492 (Balanced numbers: numbers k such that phi(k) (A000010) divides sigma(k) (A000203))" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
a
b
Sloane, N. J. A. (ed.).
"Sequence A005448 (Centered triangular numbers)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A003215 (Hex (or centered hexagonal) numbers)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A000031 (Number of n-bead necklaces with 2 colors when turning over is not allowed; also number of output sequences from a simple n-stage cycling shift register; also number of binary irreducible polynomials whose degree divides n)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A101268 (Number of compositions of n into pairwise relatively prime parts)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation. Retrieved 2022-05-31 .
^
Sloane, N. J. A. (ed.).
"Sequence A001107 (10-gonal (or decagonal) numbers)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A069099 (Centered heptagonal numbers)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A051868 (16-gonal (or hexadecagonal) numbers: a(n) = n*(7*n-6))" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A036469 (Partial sums of A000009 (partitions into distinct parts))" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
a
b
c
d
Sloane, N. J. A. (ed.).
"Sequence A005384 (Sophie Germain primes)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
a
b
Sloane, N. J. A. (ed.).
"Sequence A080076 (Proth primes)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A074501 (a(n) = 1^n + 2^n + 5^n)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation. Retrieved 2022-05-31 .
^
"Sloane's A001608 : Perrin sequence" . The On-Line Encyclopedia of Integer Sequences . OEIS Foundation. Retrieved 2016-06-11 .
^
Sloane, N. J. A. (ed.).
"Sequence A001567 (Fermat pseudoprimes to base 2)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A002464 (Hertzsprung's problem: ways to arrange n non-attacking kings on an n X n board, with 1 in each row and column. Also number of permutations of length n without rising or falling successions)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A057468 (Numbers k such that 3^k - 2^k is prime)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A001105 (a(n) = 2*n^2)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A071395 (Primitive abundant numbers)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A000330 (Square pyramidal numbers)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A000326 (Pentagonal numbers)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A001106 (9-gonal (or enneagonal or nonagonal) numbers)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A014206 (a(n) = n^2 + n + 2)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A160160 (Toothpick sequence in the three-dimensional grid)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A002379 (a(n) = floor(3^n / 2^n))" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A027480 (a(n) = n*(n+1)*(n+2)/2)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A005282 (Mian-Chowla sequence)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A108917 (Number of knapsack partitions of n)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A005900 (Octahedral numbers)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A001599 (Harmonic or Ore numbers)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A316983 (Number of non-isomorphic self-dual multiset partitions of weight n)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A005899 (Number of points on surface of octahedron with side n)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation. Retrieved 2022-05-31 .
^
Sloane, N. J. A. (ed.).
"Sequence A003001 (Smallest number of multiplicative persistence n)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation. Retrieved 2022-05-31 .
^
Sloane, N. J. A. (ed.).
"Sequence A000292 (Tetrahedral numbers)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation. Retrieved 2016-06-11 .
^
Sloane, N. J. A. (ed.).
"Sequence A000975 (Lichtenberg sequence)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation. Retrieved 2022-05-31 .
^
Sloane, N. J. A. (ed.).
"Sequence A000979 (Wagstaff primes)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation. Retrieved 2016-06-11 .
^
Sloane, N. J. A. (ed.).
"Sequence A000070 (a(n) = Sum_{k=0..n} p(k) where p(k) = number of partitions of k (A000041))" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation. Retrieved 2022-05-31 .
^
Sloane, N. J. A. (ed.).
"Sequence A001844 (Centered square numbers)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation. Retrieved 2016-06-11 .
^
Sloane, N. J. A. (ed.).
"Sequence A050535 (Number of multigraphs on infinite set of nodes with n edges)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation. Retrieved 2022-05-31 .
^
a
b
Sloane, N. J. A. (ed.).
"Sequence A033553 (3-Knödel numbers or D-numbers: numbers n > 3 such that n divides k^(n-2)-k for all k with gcd(k, n) = 1)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation. Retrieved 2022-05-31 .
^
Sloane, N. J. A. (ed.).
"Sequence A030984 (2-automorphic numbers)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation. Retrieved 2021-09-01 .
^
Sloane, N. J. A. (ed.).
"Sequence A000787 (Strobogrammatic numbers)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A000123 (Number of binary partitions: number of partitions of 2n into powers of 2)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation. Retrieved 2022-05-31 .
^
Sloane, N. J. A. (ed.).
"Sequence A045943 (Triangular matchstick numbers: a(n) = 3*n*(n+1)/2)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation. Retrieved 2022-05-31 .
^
Sloane, N. J. A. (ed.).
"Sequence A049363 (a(1) = 1; for n > 1, smallest digitally balanced number in base n)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
^
Sloane, N. J. A. (ed.).
"Sequence A076185 (Numbers n such that n!! + 2 is prime)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation. Retrieved 2022-05-31 .
^
Sloane, N. J. A. (ed.).
"Sequence A006851 (Trails of length n on honeycomb lattice)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation. Retrieved 2022-05-18 .
^
"Colorado is a rectangle? Think again" . 23 January 2023.
^
Sloane, N. J. A. (ed.).
"Sequence A045636 (Numbers of the form p^2 + q^2, with p and q primes)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
100,000
1,000,000
10,000,000
100,000,000
1,000,000,000