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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.

A365120 G.f. A(x) satisfies A(x) = (1 + x / (1 - x*A(x))^2)^2.

Table of values

n a(n)
0 1
1 2
2 5
3 18
4 70
5 294
6 1291
7 5864
8 27314
9 129766
10 626367
11 3063096
12 15143562
13 75563924
14 380062186
15 1924840480
16 9807649900
17 50241194250
18 258597717591
19 1336730670244
20 6936403057274
21 36119232561000
22 188677598254078
23 988464846388710
24 5192270327405662

List of values

[1, 2, 5, 18, 70, 294, 1291, 5864, 27314, 129766, 626367, 3063096, 15143562, 75563924, 380062186, 1924840480, 9807649900, 50241194250, 258597717591, 1336730670244, 6936403057274, 36119232561000, 188677598254078, 988464846388710, 5192270327405662]

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

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