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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.

A009613 Expansion of e.g.f. sinh(tan(x)*tan(x)) (even powers only).

Table of values

n a(n)
0 0
1 2
2 16
3 392
4 21376
5 1875872
6 227105536
7 35750690432
8 7110343684096
9 1750588208886272
10 523940264885702656
11 187423773435078920192
12 78905518064423548911616
13 38568578386644134655598592

List of values

[0, 2, 16, 392, 21376, 1875872, 227105536, 35750690432, 7110343684096, 1750588208886272, 523940264885702656, 187423773435078920192, 78905518064423548911616, 38568578386644134655598592]

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

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