# The On-Line Encyclopedia of Integer Sequences

@article{Sloane1994TheOE,
title={The On-Line Encyclopedia of Integer Sequences},
author={N. J. A. Sloane},
journal={Electron. J. Comb.},
year={1994},
volume={1}
}
• N. Sloane
• Published 24 December 2003
• Computer Science
• Electron. J. Comb.
The On-Line Encyclopedia of Integer Sequences (or OEIS) is a database of some 130000 number sequences. It is freely available on the Web (http://www.research.att.com/~njas/sequences/) and is widely used. There are several ways in which it benefits research: 1 It serves as a dictionary, to tell the user what is known about a particular sequence. There are hundreds of papers which thank the OEIS for assistance in this way. 1 The associated Sequence Fans mailing list is a worldwide network…
5,754 Citations
The encyclopedia of integer sequences
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This book presents methods for Computer Investigation of Sequences, a method for hand analysis of sequences, and some of the methods used in this work, as well as suggestions for further study.
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The experimental method is applied to certain problems in number theory and combinatorics to understand certain integer sequences, and the recurrence an=an-1 +gcdn,an- 1 , which is shown to generate primes in a certain sense.
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Formula Semantification and Automated Relation Finding in the On-Line Encyclopedia for Integer Sequences
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This paper provides a partial parser for the OEIS that leverages the fact that, in practice, the syntax used in its formulas is fairly regular, and imports the result into OMDoc to make the O EIS accessible to O MDoc-based knowledge management applications.
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The discriminator of an integer sequence s = (s(i))i≥0, introduced by Arnold, Benkoski, and McCabe in 1985, is the map Ds(n) that sends n ≥ 1 to the least positive integer m such that the n numbers

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