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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.

A338661 a(n) = Sum_{d|n} d^n * binomial(d+n/d-2, d-1).

Table of values

n a(n)
1 1
2 5
3 28
4 289
5 3126
6 49036
7 823544
8 17040385
9 387538588
10 10048833246
11 285311670612
12 8929334253419
13 302875106592254
14 11116754387182648
15 437894348359764856
16 18448995959423107073
17 827240261886336764178
18 39347761059781438793815
19 1978419655660313589123980

List of values

[1, 5, 28, 289, 3126, 49036, 823544, 17040385, 387538588, 10048833246, 285311670612, 8929334253419, 302875106592254, 11116754387182648, 437894348359764856, 18448995959423107073, 827240261886336764178, 39347761059781438793815, 1978419655660313589123980]

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

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