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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.

A036721 G.f. satisfies A(x) = 1 + x*cycle_index(Sym(5), A(x)).

Table of values

n a(n)
0 1
1 1
2 1
3 2
4 4
5 9
6 20
7 47
8 112
9 277
10 693
11 1766
12 4547
13 11852
14 31146
15 82534
16 220149
17 590834
18 1593951
19 4320723
20 11761394
21 32138301
22 88121176
23 242383729
24 668607115
25 1849194691
26 5126800907
27 14245679652
28 39666239726
29 110661514973
30 309280533011
31 865839831118

List of values

[1, 1, 1, 2, 4, 9, 20, 47, 112, 277, 693, 1766, 4547, 11852, 31146, 82534, 220149, 590834, 1593951, 4320723, 11761394, 32138301, 88121176, 242383729, 668607115, 1849194691, 5126800907, 14245679652, 39666239726, 110661514973, 309280533011, 865839831118]

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

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