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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.

A081559 Expansion of e.g.f.: exp(cosh(2*x)-1), even powers only.

Table of values

n a(n)
0 1
1 4
2 64
3 1984
4 97024
5 6713344
6 615829504
7 71654785024
8 10243143368704
9 1755968011239424
10 354197952894337024
11 82788022987201183744
12 22140953727834378993664
13 6703959915806302859689984
14 2277487386474356139699994624
15 861378969099073547571187154944

List of values

[1, 4, 64, 1984, 97024, 6713344, 615829504, 71654785024, 10243143368704, 1755968011239424, 354197952894337024, 82788022987201183744, 22140953727834378993664, 6703959915806302859689984, 2277487386474356139699994624, 861378969099073547571187154944]

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

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