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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.

A308692 a(n) = Sum_{d|n} d^(2*(n/d - 1)).

Table of values

n a(n)
1 1
2 2
3 2
4 6
5 2
6 27
7 2
8 82
9 83
10 283
11 2
12 2047
13 2
14 4147
15 7188
16 20546
17 2
18 125964
19 2
20 343407
21 533844
22 1048699
23 2
24 10076747
25 390627
26 16777387
27 43053284
28 84003927
29 2
30 667311413
31 2
32 1342439682
33 3486799044
34 4294967587
35 249905428
36 52916914768
37 2
38 68719477099
39 282429565044

List of values

[1, 2, 2, 6, 2, 27, 2, 82, 83, 283, 2, 2047, 2, 4147, 7188, 20546, 2, 125964, 2, 343407, 533844, 1048699, 2, 10076747, 390627, 16777387, 43053284, 84003927, 2, 667311413, 2, 1342439682, 3486799044, 4294967587, 249905428, 52916914768, 2, 68719477099, 282429565044]

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

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