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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.

A296839 Expansion of e.g.f. tan(x*tan(x/2)) (even powers only).

Table of values

n a(n)
0 0
1 1
2 1
3 33
4 437
5 22205
6 978873
7 81005113
8 7356832669
9 949918117653
10 142805534055905
11 27120922891214801
12 6016195462632487941
13 1592800634594574194413
14 486576430503128985793417
15 171866951067212728072402665
16 69025662074064538734826793453

List of values

[0, 1, 1, 33, 437, 22205, 978873, 81005113, 7356832669, 949918117653, 142805534055905, 27120922891214801, 6016195462632487941, 1592800634594574194413, 486576430503128985793417, 171866951067212728072402665, 69025662074064538734826793453]

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

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