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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.

A369740 a(n) = Sum_{p|n, p prime} p^sigma(n/p).

Table of values

n a(n)
1 0
2 2
3 3
4 8
5 5
6 43
7 7
8 128
9 81
10 189
11 11
12 6283
13 13
14 599
15 1354
16 32768
17 17
18 539633
19 19
20 340269
21 8962
22 5427
23 23
24 282784363
25 15625
26 18581
27 1594323
28 17600759
29 29
30 648338330
31 31
32 2147483648
33 546082
34 267057
35 508274
36 23426548268849
37 37
38 1055435
39 4811530
40 4428564089229
41 41
42 300565790978

List of values

[0, 2, 3, 8, 5, 43, 7, 128, 81, 189, 11, 6283, 13, 599, 1354, 32768, 17, 539633, 19, 340269, 8962, 5427, 23, 282784363, 15625, 18581, 1594323, 17600759, 29, 648338330, 31, 2147483648, 546082, 267057, 508274, 23426548268849, 37, 1055435, 4811530, 4428564089229, 41, 300565790978]

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

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