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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.

A206293 G.f. satisfies: A(x) = Sum_{n>=0} Product_{k=1..n} Series_Reversion( x/A(x^k) ).

Table of values

n a(n)
0 1
1 1
2 2
3 5
4 18
5 78
6 415
7 2467
8 16212
9 114623
10 863229
11 6858780
12 57156213
13 497147291
14 4497291265
15 42189445764
16 409478828567
17 4103901097024
18 42403116824997
19 451059832858894
20 4933844398096693
21 55436157047213427
22 639215949145395559
23 7557505365363885063

List of values

[1, 1, 2, 5, 18, 78, 415, 2467, 16212, 114623, 863229, 6858780, 57156213, 497147291, 4497291265, 42189445764, 409478828567, 4103901097024, 42403116824997, 451059832858894, 4933844398096693, 55436157047213427, 639215949145395559, 7557505365363885063]

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

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