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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.

A354899 a(n) = n! * Sum_{d|n} d^d / (d! * (n/d)!).

Table of values

n a(n)
1 1
2 5
3 28
4 281
5 3126
6 48517
7 823544
8 16995617
9 387692650
10 10047310481
11 285311670612
12 8932562801857
13 302875106592254
14 11119129387084097
15 437899615088648176
16 18451106376806703617
17 827240261886336764178
18 39349894934527426209025

List of values

[1, 5, 28, 281, 3126, 48517, 823544, 16995617, 387692650, 10047310481, 285311670612, 8932562801857, 302875106592254, 11119129387084097, 437899615088648176, 18451106376806703617, 827240261886336764178, 39349894934527426209025]

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

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