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The On-Line Encyclopedia of Integer Sequences® (OEIS®) Enter a sequence, word, or sequence number: Hints Welcome Video. For more information about the Encyclopedia, see the Welcome page.
18 dic 2023 · The On-Line Encyclopedia of Integer Sequences® (OEIS®) Wiki. This is the Wiki part of the OEIS. Many pages of information about the OEIS--everything except the sequences themselves.
14 giu 2024 · The introductory chapters from N. J. A. Sloane's Handbook of Integer Sequences (1973) (click here) and N. J. A. Sloane and S. Plouffe's Encyclopedia of Integer Sequences (1995) (click here) contain much useful information about analyzing an unknown sequence and many other topics.
OEIS records information on integer sequences of interest to both professional and amateur mathematicians, and is widely cited. As of February 2024, it contains over 370,000 sequences, [5] and is growing by approximately 30 entries per day.
This is a list of notable integer sequences with links to their entries in the On-Line Encyclopedia of Integer Sequences.
NameFirst ElementsShort DescriptionOeis1, 2, 2, 1, 1, 2, 1, 2, 2, 1, ...The nth term describes the length of the ...1, 1, 2, 2, 4, 2, 6, 4, 6, 4, ...φ(n) is the number of positive integers ...Lucas numbers L(n)2, 1, 3, 4, 7, 11, 18, 29, 47, 76, ...L(n) = L(n − 1) + L(n − 2) for n ≥ 2, ...2, 3, 5, 7, 11, 13, 17, 19, 23, 29, ...The prime numbers pn, with n ≥ 1. A prime ...La On-Line Encyclopedia of Integer Sequences, in sigla OEIS, è un archivio accessibile su web di successioni di interi. Costituisce la più grande e utilizzata raccolta di successioni e il riferimento più autorevole per il settore delle successioni di interi, al punto che molti testi che si occupano di successioni di interi ...
The OEIS is a database of nearly 90,000 sequences of integers, arranged lexicographically. The entry for a sequence lists the initial terms (50 to 100, if avail-able), a description, formulae, programs to gener-ate the sequence, references, links to relevant web pages, and other information.
