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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.

A012816 E.g.f. arctan(sec(x)*sinh(x)) (odd powers only).

Table of values

n a(n)
0 1
1 2
2 -20
3 -488
4 22160
5 1616672
6 -172976960
7 -25518205568
8 4964227109120
9 1231298393825792
10 -379260096755225600
11 -142026494757146421248
12 63547531933929827962880
13 33481297996129270926221312
14 -20517021964757071715832381440
15 -14468510293983989090015078678528

List of values

[1, 2, -20, -488, 22160, 1616672, -172976960, -25518205568, 4964227109120, 1231298393825792, -379260096755225600, -142026494757146421248, 63547531933929827962880, 33481297996129270926221312, -20517021964757071715832381440, -14468510293983989090015078678528]

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

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