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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.

A331612 E.g.f.: exp(1 / (2 - sec(x)) - 1) (even powers only).

Table of values

n a(n)
0 1
1 1
2 14
3 481
4 30449
5 3064306
6 448104029
7 89621046061
8 23468873468054
9 7786478152466221
10 3190021872763911149
11 1580829351026679822586
12 931656913226081002622489
13 643808850722810399312420281
14 515431991397502094847830786174
15 473171296200788822261644150349881

List of values

[1, 1, 14, 481, 30449, 3064306, 448104029, 89621046061, 23468873468054, 7786478152466221, 3190021872763911149, 1580829351026679822586, 931656913226081002622489, 643808850722810399312420281, 515431991397502094847830786174, 473171296200788822261644150349881]

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

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