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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.

A356406 a(n) = n! * Sum_{k=1..n} Sum_{d|k} 1/(d * (k/d)^d).

Table of values

n a(n)
1 1
2 4
3 16
4 79
5 443
6 2968
7 22216
8 189698
9 1792402
10 18745036
11 213452996
12 2653142952
13 35448861576
14 509724975264
15 7824794618208
16 128006170541328
17 2217950478978576
18 40686737647774368
19 785852762719168992
20 15974195890305405696
21 340376906088298319616

List of values

[1, 4, 16, 79, 443, 2968, 22216, 189698, 1792402, 18745036, 213452996, 2653142952, 35448861576, 509724975264, 7824794618208, 128006170541328, 2217950478978576, 40686737647774368, 785852762719168992, 15974195890305405696, 340376906088298319616]

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

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