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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.

A359442 a(n) = Sum_{d|n} d^(n + 1 - d - n/d).

Table of values

n a(n)
1 1
2 2
3 2
4 4
5 2
6 15
7 2
8 74
9 83
10 643
11 2
12 12635
13 2
14 117715
15 397188
16 2359426
17 2
18 103572204
19 2
20 1260918355
21 13841818644
22 25937425627
23 2
24 5612318393211
25 152587890627
26 23298085126579
27 1853020231898564
28 2422197090649523
29 2
30 1032944452284531101
31 2
32 10376297939508166658

List of values

[1, 2, 2, 4, 2, 15, 2, 74, 83, 643, 2, 12635, 2, 117715, 397188, 2359426, 2, 103572204, 2, 1260918355, 13841818644, 25937425627, 2, 5612318393211, 152587890627, 23298085126579, 1853020231898564, 2422197090649523, 2, 1032944452284531101, 2, 10376297939508166658]

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

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