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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.

A369502 Expansion of (1/x) * Series_Reversion( x / ((1+x)^2+x)^2 ).

Table of values

n a(n)
0 1
1 6
2 47
3 420
4 4059
5 41316
6 436345
7 4737018
8 52535950
9 592667532
10 6779699073
11 78458218746
12 916886214115
13 10805128064100
14 128260666769895
15 1532180536574580
16 18405744106135914
17 222204347510440092
18 2694506677864591810
19 32804976554127379680
20 400837173223351237295

List of values

[1, 6, 47, 420, 4059, 41316, 436345, 4737018, 52535950, 592667532, 6779699073, 78458218746, 916886214115, 10805128064100, 128260666769895, 1532180536574580, 18405744106135914, 222204347510440092, 2694506677864591810, 32804976554127379680, 400837173223351237295]

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

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