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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.

A215340 Expansion of series_reversion( x/(1 + sum(k>=1, x^A032766(k)) ) ) / x.

Table of values

n a(n)
0 1
1 1
2 1
3 2
4 6
5 16
6 40
7 107
8 307
9 893
10 2597
11 7646
12 22878
13 69162
14 210402
15 644098
16 1984598
17 6149428
18 19143220
19 59840692
20 187781992
21 591343894
22 1868106990
23 5918537492
24 18800935948
25 59869902152
26 191081899648
27 611138052146
28 1958410654202
29 6287175115130
30 20218209139666
31 65120537016867

List of values

[1, 1, 1, 2, 6, 16, 40, 107, 307, 893, 2597, 7646, 22878, 69162, 210402, 644098, 1984598, 6149428, 19143220, 59840692, 187781992, 591343894, 1868106990, 5918537492, 18800935948, 59869902152, 191081899648, 611138052146, 1958410654202, 6287175115130, 20218209139666, 65120537016867]

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

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