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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.

A292760 Expansion of e.g.f. (tan x + sec x)*(E.g.f. for A000738).

Table of values

n a(n)
0 0
1 1
2 5
3 20
4 83
5 375
6 1860
7 10205
8 61701
9 409240
10 2959775
11 23209055
12 196266104
13 1781241825
14 17274311925
15 178313963300
16 1952338563867
17 22601633554855
18 275867860584620
19 3540918330014765
20 47682832410552965
21 672211363480355880
22 9901286664553498695
23 152101199645144064575

List of values

[0, 1, 5, 20, 83, 375, 1860, 10205, 61701, 409240, 2959775, 23209055, 196266104, 1781241825, 17274311925, 178313963300, 1952338563867, 22601633554855, 275867860584620, 3540918330014765, 47682832410552965, 672211363480355880, 9901286664553498695, 152101199645144064575]

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

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