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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.

A143917 G.f. A(x) satisfies A(x) = 1/(1-x) + x^2*A(x)*A'(x).

Table of values

n a(n)
0 1
1 1
2 2
3 6
4 25
5 133
6 851
7 6313
8 53061
9 497493
10 5144500
11 58161126
12 713789847
13 9453038227
14 134405493652
15 2042529150110
16 33045300698761
17 567165849906233
18 10294218618819268
19 197022941365579804
20 3966001076798967837
21 83767346751954718361
22 1852440991624711835677

List of values

[1, 1, 2, 6, 25, 133, 851, 6313, 53061, 497493, 5144500, 58161126, 713789847, 9453038227, 134405493652, 2042529150110, 33045300698761, 567165849906233, 10294218618819268, 197022941365579804, 3966001076798967837, 83767346751954718361, 1852440991624711835677]

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

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