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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.

A351749 a(n) = Sum_{p|n, p prime} sigma_p(p).

Table of values

n a(n)
1 0
2 5
3 28
4 5
5 3126
6 33
7 823544
8 5
9 28
10 3131
11 285311670612
12 33
13 302875106592254
14 823549
15 3154
16 5
17 827240261886336764178
18 33
19 1978419655660313589123980
20 3131
21 823572
22 285311670617
23 20880467999847912034355032910568
24 33
25 3126
26 302875106592259

List of values

[0, 5, 28, 5, 3126, 33, 823544, 5, 28, 3131, 285311670612, 33, 302875106592254, 823549, 3154, 5, 827240261886336764178, 33, 1978419655660313589123980, 3131, 823572, 285311670617, 20880467999847912034355032910568, 33, 3126, 302875106592259]

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

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