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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.

A371612 G.f. satisfies A(x) = ( 1 + x / (1 - x*A(x)^2) )^2.

Table of values

n a(n)
0 1
1 2
2 3
3 12
4 49
5 218
6 1037
7 5106
8 25909
9 134410
10 709691
11 3801498
12 20606654
13 112828202
14 623087675
15 3466539248
16 19411070496
17 109313442562
18 618713495451
19 3517737628368
20 20081523836403
21 115058714898196
22 661432784830204
23 3813891082337178
24 22052422636145522

List of values

[1, 2, 3, 12, 49, 218, 1037, 5106, 25909, 134410, 709691, 3801498, 20606654, 112828202, 623087675, 3466539248, 19411070496, 109313442562, 618713495451, 3517737628368, 20081523836403, 115058714898196, 661432784830204, 3813891082337178, 22052422636145522]

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

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