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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.

A356543 a(n) = Sum_{d|n} (d!)^(n/d-1).

Table of values

n a(n)
1 1
2 2
3 2
4 4
5 2
6 12
7 2
8 34
9 38
10 138
11 2
12 1546
13 2
14 5106
15 15698
16 54274
17 2
18 889314
19 2
20 5689090
21 25448258
22 39917826
23 2
24 2486196610
25 207360002
26 6227024898
27 131683574018
28 215393466370
29 2
30 14769495662082
31 2
32 86475697160194
33 1593350982706178
34 355687428161538
35 648227266560002

List of values

[1, 2, 2, 4, 2, 12, 2, 34, 38, 138, 2, 1546, 2, 5106, 15698, 54274, 2, 889314, 2, 5689090, 25448258, 39917826, 2, 2486196610, 207360002, 6227024898, 131683574018, 215393466370, 2, 14769495662082, 2, 86475697160194, 1593350982706178, 355687428161538, 648227266560002]

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

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