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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.

A291421 G.f. A(x) satisfies: A( x - A(x)^2*(1 + A(x))^2 ) = x.

Table of values

n a(n)
1 1
2 1
3 6
4 45
5 414
6 4310
7 49068
8 598253
9 7707738
10 103981222
11 1459259444
12 21201220726
13 317718863636
14 4897066444332
15 77455837982360
16 1254882911977597
17 20793816009974054
18 351973815700006842
19 6079707258590589100
20 107070921557974264470
21 1921112466081500096044
22 35095122874748021511252
23 652393778217784214993656
24 12334667847853804120010726

List of values

[1, 1, 6, 45, 414, 4310, 49068, 598253, 7707738, 103981222, 1459259444, 21201220726, 317718863636, 4897066444332, 77455837982360, 1254882911977597, 20793816009974054, 351973815700006842, 6079707258590589100, 107070921557974264470, 1921112466081500096044, 35095122874748021511252, 652393778217784214993656, 12334667847853804120010726]

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

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