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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A344260 a(n) is the number of relations from an n-element set into a set of at most n elements.

Table of values

n a(n)
0 1
1 3
2 21
3 585
4 69905
5 34636833
6 69810262081
7 567382630219905
8 18519084246547628289
9 2422583247133816584929793
10 1268889750375080065623288448001
11 2659754699919401766201267083003561985
12 22306191045953951743035482794815064402563073
13 748380193317489370459454048174977015562807531282433

List of values

[1, 3, 21, 585, 69905, 34636833, 69810262081, 567382630219905, 18519084246547628289, 2422583247133816584929793, 1268889750375080065623288448001, 2659754699919401766201267083003561985, 22306191045953951743035482794815064402563073, 748380193317489370459454048174977015562807531282433]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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