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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.

A386229 G.f. A(x) satisfies A(x) = 1/( (1-x)^2 * (1 - x*A(x) - x^2*A'(x)) ).

Table of values

n a(n)
0 1
1 3
2 12
3 70
4 535
5 4908
6 51478
7 600584
8 7662285
9 105684465
10 1563183259
11 24645719004
12 412279514088
13 7290426692472
14 135862518564330
15 2661378323466016
16 54675576786754501
17 1175673956931922257
18 26411686616265112230
19 618863341216409971750
20 15101129008183181824938

List of values

[1, 3, 12, 70, 535, 4908, 51478, 600584, 7662285, 105684465, 1563183259, 24645719004, 412279514088, 7290426692472, 135862518564330, 2661378323466016, 54675576786754501, 1175673956931922257, 26411686616265112230, 618863341216409971750, 15101129008183181824938]

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

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