The On-Line Encyclopedia of Integer Sequences (OEIS) is an online database of integer sequences. It was created and maintained by Neil Sloane while researching...
46 KB (5,601 words) - 19:56, 8 May 2025
This is a list of notable integer sequences with links to their entries in the On-Line Encyclopedia of Integer Sequences. OEIS core sequences Index to OEIS...
27 KB (27 words) - 18:11, 30 May 2025
sequence Ulam numbers Weird numbers Wolstenholme number Constant-recursive sequence On-Line Encyclopedia of Integer Sequences List of OEIS sequences Hamkins...
5 KB (671 words) - 01:43, 7 January 2025
7 (redirect from Symbolism of the number 7)
A. (ed.). "Sequence A001676 (Number of h-cobordism classes of smooth homotopy n-spheres.)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation...
29 KB (2,747 words) - 19:53, 14 June 2025
1000 (number) (category Integers)
On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Sloane, N. J. A. (ed.). "Sequence A018805". The On-Line Encyclopedia of Integer Sequences...
146 KB (24,122 words) - 10:05, 18 June 2025
700 (number) (category Integers)
Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 11 June 2016. "Sloane's A005282 : Mian-Chowla sequence". The On-Line Encyclopedia of Integer Sequences...
28 KB (4,053 words) - 15:07, 31 May 2025
400 (number) (category Integers)
of Integer Sequences. OEIS Foundation. Sloane, N. J. A. (ed.). "Sequence A005900 (Octahedral numbers)". The On-Line Encyclopedia of Integer Sequences. OEIS...
35 KB (5,336 words) - 13:15, 6 June 2025
10,000 (category Integers)
Encyclopedia of Integer Sequences. OEIS Foundation. Sloane, N. J. A. (ed.). "Sequence A006037 (Weird numbers)". The On-Line Encyclopedia of Integer Sequences. OEIS...
40 KB (4,944 words) - 00:35, 12 June 2025
2000 (number) (category Integers)
Integer Sequences. OEIS Foundation. Sloane, N. J. A. (ed.). "Sequence A005282 (Mian-Chowla sequence)". The On-Line Encyclopedia of Integer Sequences....
32 KB (4,732 words) - 16:33, 18 June 2025
19 (number) (category Integers)
The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2022-07-13. Sloane, N. J. A. "Sequence A186076". The On-line Encyclopedia of Integer...
28 KB (3,906 words) - 15:33, 22 June 2025
23 (number) (category Integers)
(ed.). "Sequence A007770 (Happy numbers)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 31 May 2016. (sequence A045345 in...
20 KB (3,114 words) - 21:30, 17 June 2025
100,000 (category Integers)
Encyclopedia of Integer Sequences. OEIS Foundation. Sloane, N. J. A. (ed.). "Sequence A001006 (Motzkin numbers)". The On-Line Encyclopedia of Integer Sequences. OEIS...
29 KB (3,836 words) - 02:01, 18 June 2025
800 (number) (category Integers)
"Sequence A001606 (Indices of prime Lucas numbers)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Sloane, N. J. A. (ed.). "Sequence...
22 KB (3,911 words) - 22:13, 22 June 2025
600 (number) (category Integers)
of Integer Sequences. OEIS Foundation. Sloane, N. J. A. (ed.). "Sequence A006753 (Smith numbers)". The On-Line Encyclopedia of Integer Sequences. OEIS...
24 KB (3,965 words) - 01:38, 2 June 2025
70 (number) (category Integers)
of a pair of sexy primes.))". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2024-07-31. Sloane, N. J. A. (ed.). "Sequence...
12 KB (1,706 words) - 15:44, 22 June 2025
1,000,000,000 (category Integers)
On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Sloane, N. J. A. (ed.). "Sequence A001006 (Motzkin numbers)". The On-Line Encyclopedia of...
30 KB (3,740 words) - 14:48, 21 June 2025
5 (redirect from Square root of 25)
"Sequence A000043 (mersenne prime exponents)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Sloane, N. J. A. (ed.). "Sequence A003273...
19 KB (1,814 words) - 19:19, 10 June 2025
31 (number) (category Integers)
"Sequence A072136 (Position of the first zero in the fractional part of the base n expansion of Pi.)". The On-Line Encyclopedia of Integer Sequences....
15 KB (2,067 words) - 14:34, 5 June 2025
500 (number) (category Integers)
Encyclopedia of Integer Sequences. OEIS Foundation. Sloane, N. J. A. (ed.). "Sequence A000179 (Ménage numbers)". The On-Line Encyclopedia of Integer Sequences...
39 KB (5,701 words) - 11:29, 11 May 2025
300 (number) (category Integers)
Encyclopedia of Integer Sequences. OEIS Foundation. Sloane, N. J. A. (ed.). "Sequence A003052 (Self numbers)". The On-Line Encyclopedia of Integer Sequences. OEIS...
23 KB (3,625 words) - 14:06, 13 June 2025
29 (number) (category Integers)
Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-31. "Sloane's A001608 : Perrin sequence". The On-Line Encyclopedia of Integer Sequences. OEIS...
8 KB (1,133 words) - 01:13, 26 May 2025
10,000,000,000 (category Integers)
). "Sequence A003617 (Smallest n-digit prime)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Sloane, N. J. A. (ed.). "Sequence A050288...
15 KB (1,725 words) - 14:22, 20 May 2025
1,000,000 (redirect from 10 to the power of 6)
Encyclopedia of Integer Sequences. OEIS Foundation. Sloane, N. J. A. (ed.). "Sequence A000979 (Wagstaff primes)". The On-Line Encyclopedia of Integer...
29 KB (3,857 words) - 10:00, 23 June 2025
90 (number) (category Integers)
Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2021-12-24. "Sloane's A001608 : Perrin sequence". The On-Line Encyclopedia of Integer Sequences...
15 KB (2,028 words) - 18:26, 11 April 2025
100,000,000 (category Integers)
Integer Sequences. OEIS Foundation. Sloane, N. J. A. (ed.). "Sequence A030984 (2-automorphic numbers)". The On-Line Encyclopedia of Integer Sequences...
18 KB (2,359 words) - 16:34, 9 June 2025
900 (number) (category Integers)
On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Sloane, N. J. A. (ed.). "Sequence A005727". The On-Line Encyclopedia of Integer Sequences...
30 KB (3,867 words) - 15:42, 22 June 2025
3000 (number) (category Integers)
Encyclopedia of Integer Sequences. OEIS Foundation. Sloane, N. J. A. (ed.). "Sequence A006562 (Balanced primes)". The On-Line Encyclopedia of Integer Sequences. OEIS...
16 KB (2,086 words) - 15:28, 5 June 2025
10,000,000 (category Integers)
of Integer Sequences. OEIS Foundation. Sloane, N. J. A. (ed.). "Sequence A001006 (Motzkin numbers)". The On-Line Encyclopedia of Integer Sequences. OEIS...
19 KB (2,428 words) - 14:52, 23 June 2025
100,000,000,000 (category Integers)
Encyclopedia of Integer Sequences. OEIS Foundation. Sloane, N. J. A. (ed.). "Sequence A000129 (Pell numbers)". The On-Line Encyclopedia of Integer Sequences. OEIS...
9 KB (1,066 words) - 20:31, 22 June 2025
72 (number) (category Integers)
N. J. A. (ed.). "Sequence A033880 (Abundance of n, or (sum of divisors of n) - 2n.)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation....
15 KB (2,071 words) - 12:41, 21 April 2025