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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.

A081440 Expansion of e.g.f.: exp(x)*cosh(x/sqrt(1 - x^2)).

Table of values

n a(n)
0 1
1 1
2 2
3 4
4 20
5 76
6 632
7 3424
8 38096
9 265360
10 3682592
11 31332544
12 520705088
13 5232870592
14 101265169280
15 1173634791424
16 25911499036928
17 340187621683456
18 8436057652027904
19 123731966851240960
20 3404264757518332928

List of values

[1, 1, 2, 4, 20, 76, 632, 3424, 38096, 265360, 3682592, 31332544, 520705088, 5232870592, 101265169280, 1173634791424, 25911499036928, 340187621683456, 8436057652027904, 123731966851240960, 3404264757518332928]

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

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