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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.

A009268 Expansion of e.g.f. exp(tanh(x)*exp(x)).

Table of values

n a(n)
0 1
1 1
2 3
3 8
4 25
5 92
6 369
7 1626
8 8033
9 42312
10 230081
11 1354190
12 8806769
13 59072860
14 398252833
15 2892141666
16 22862362049
17 182200364944
18 1492258801793
19 13163090657814
20 111357664397265
21 938233188787748
22 11338336523834337

List of values

[1, 1, 3, 8, 25, 92, 369, 1626, 8033, 42312, 230081, 1354190, 8806769, 59072860, 398252833, 2892141666, 22862362049, 182200364944, 1492258801793, 13163090657814, 111357664397265, 938233188787748, 11338336523834337]

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

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