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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.

A371523 G.f. A(x) satisfies A(x) = (1 + x*A(x)^3 / (1-x))^2.

Table of values

n a(n)
0 1
1 2
2 15
3 142
4 1533
5 17924
6 220936
7 2827218
8 37202580
9 500228562
10 6842899886
11 94931338876
12 1332438761910
13 18887047322030
14 269986427261981
15 3887654399820062
16 56337997080499605
17 821021578186212094
18 12024687038651388155
19 176900548019426869808
20 2612917215947948178941

List of values

[1, 2, 15, 142, 1533, 17924, 220936, 2827218, 37202580, 500228562, 6842899886, 94931338876, 1332438761910, 18887047322030, 269986427261981, 3887654399820062, 56337997080499605, 821021578186212094, 12024687038651388155, 176900548019426869808, 2612917215947948178941]

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

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