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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.

A331611 E.g.f.: exp(1 / (2 - cosh(x)) - 1) (even powers only).

Table of values

n a(n)
0 1
1 1
2 10
3 241
4 10585
5 732826
6 73233205
7 9955632961
8 1764233731270
9 394629336427021
10 108652463882802505
11 36084903957564392206
12 14217903951354603567385
13 6554505383225768210009041
14 3493988190176442653240091010
15 2131975894217009666242489287001

List of values

[1, 1, 10, 241, 10585, 732826, 73233205, 9955632961, 1764233731270, 394629336427021, 108652463882802505, 36084903957564392206, 14217903951354603567385, 6554505383225768210009041, 3493988190176442653240091010, 2131975894217009666242489287001]

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

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