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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.

A381572 G.f. A(x) satisfies A(x) = 1/(1 - x*A(x*A(x)))^2.

Table of values

n a(n)
0 1
1 2
2 7
3 38
4 267
5 2232
6 21200
7 222556
8 2536661
9 31010886
10 403097573
11 5535291884
12 79900803514
13 1207657432714
14 19052200105025
15 312909670649562
16 5338325737985841
17 94422672774323512
18 1728653714036740230
19 32708138881741705812
20 638762549199936808759
21 12859693257887577375744

List of values

[1, 2, 7, 38, 267, 2232, 21200, 222556, 2536661, 31010886, 403097573, 5535291884, 79900803514, 1207657432714, 19052200105025, 312909670649562, 5338325737985841, 94422672774323512, 1728653714036740230, 32708138881741705812, 638762549199936808759, 12859693257887577375744]

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

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