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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.

A003727 Expansion of e.g.f. exp(x * cosh(x)).

Table of values

n a(n)
0 1
1 1
2 1
3 4
4 13
5 36
6 181
7 848
8 3865
9 23824
10 140521
11 871872
12 6324517
13 44942912
14 344747677
15 2860930816
16 23853473329
17 213856723200
18 1996865965009
19 19099352929280
20 193406280000061
21 2010469524579328
22 21615227339380357
23 242177953175506944

List of values

[1, 1, 1, 4, 13, 36, 181, 848, 3865, 23824, 140521, 871872, 6324517, 44942912, 344747677, 2860930816, 23853473329, 213856723200, 1996865965009, 19099352929280, 193406280000061, 2010469524579328, 21615227339380357, 242177953175506944]

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

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