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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.

A369486 Expansion of (1/x) * Series_Reversion( x / (1-x) * (1-x-x^2)^2 ).

Table of values

n a(n)
0 1
1 1
2 4
3 15
4 67
5 314
6 1547
7 7865
8 41004
9 217953
10 1176832
11 6436676
12 35587416
13 198569471
14 1116741601
15 6323669519
16 36024382515
17 206315985386
18 1187205083042
19 6860598312545
20 39797882898452
21 231666709974264
22 1352813494962672
23 7922553881534274
24 46520280837291427

List of values

[1, 1, 4, 15, 67, 314, 1547, 7865, 41004, 217953, 1176832, 6436676, 35587416, 198569471, 1116741601, 6323669519, 36024382515, 206315985386, 1187205083042, 6860598312545, 39797882898452, 231666709974264, 1352813494962672, 7922553881534274, 46520280837291427]

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

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