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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.

A357649 Expansion of e.g.f. cosh( (exp(3*x) - 1)/3 ).

Table of values

n a(n)
0 1
1 0
2 1
3 9
4 64
5 435
6 3097
7 24822
8 232759
9 2517345
10 30070954
11 382827225
12 5110770205
13 71421582024
14 1049487311485
15 16286699945853
16 267145966335088
17 4616924929100535
18 83622792656855125
19 1578916985654901366
20 30957723637379211115
21 628927539690331202661

List of values

[1, 0, 1, 9, 64, 435, 3097, 24822, 232759, 2517345, 30070954, 382827225, 5110770205, 71421582024, 1049487311485, 16286699945853, 267145966335088, 4616924929100535, 83622792656855125, 1578916985654901366, 30957723637379211115, 628927539690331202661]

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

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