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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.

A385308 Expansion of e.g.f. 1/(1 - 2 * x * cosh(x))^(1/2).

Table of values

n a(n)
0 1
1 1
2 3
3 18
4 141
5 1400
6 17055
7 245392
8 4070073
9 76483584
10 1606033755
11 37267953536
12 947051118981
13 26156846230528
14 780174007426359
15 24992424003517440
16 855795857724702705
17 31193844533488074752
18 1205893835653392258867
19 49280187764171870470144
20 2122704756621224015194365

List of values

[1, 1, 3, 18, 141, 1400, 17055, 245392, 4070073, 76483584, 1606033755, 37267953536, 947051118981, 26156846230528, 780174007426359, 24992424003517440, 855795857724702705, 31193844533488074752, 1205893835653392258867, 49280187764171870470144, 2122704756621224015194365]

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

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