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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.

A371391 Expansion of (1/x) * Series_Reversion( x * (1-x) / (1+2*x)^2 ).

Table of values

n a(n)
0 1
1 5
2 34
3 269
4 2326
5 21314
6 203428
7 2000957
8 20142862
9 206524790
10 2149261852
11 22644243218
12 241061343004
13 2589022298084
14 28019201644744
15 305254481274269
16 3345077342003134
17 36846738570089774
18 407754101877613804
19 4531049315843043974
20 50538820796852529364

List of values

[1, 5, 34, 269, 2326, 21314, 203428, 2000957, 20142862, 206524790, 2149261852, 22644243218, 241061343004, 2589022298084, 28019201644744, 305254481274269, 3345077342003134, 36846738570089774, 407754101877613804, 4531049315843043974, 50538820796852529364]

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

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