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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.

A370877 Expansion of e.g.f. (1/x) * Series_Reversion( x/(x + exp(x^2/2)) ).

Table of values

n a(n)
0 1
1 1
2 3
3 15
4 111
5 1095
6 13605
7 204225
8 3597825
9 72788625
10 1663323795
11 42373980495
12 1190822561775
13 36596898673335
14 1221033470181525
15 43954996792932225
16 1698138394110583425
17 70082689941923083425
18 3077205709746516423075
19 143235112906380591471375

List of values

[1, 1, 3, 15, 111, 1095, 13605, 204225, 3597825, 72788625, 1663323795, 42373980495, 1190822561775, 36596898673335, 1221033470181525, 43954996792932225, 1698138394110583425, 70082689941923083425, 3077205709746516423075, 143235112906380591471375]

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

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