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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.

A338171 a(n) is the sum of those divisors d of n such that tau(d) divides sigma(d).

Table of values

n a(n)
1 1
2 1
3 4
4 1
5 6
6 10
7 8
8 1
9 4
10 6
11 12
12 10
13 14
14 22
15 24
16 1
17 18
18 10
19 20
20 26
21 32
22 34
23 24
24 10
25 6
26 14
27 31
28 22
29 30
30 60
31 32
32 1
33 48
34 18
35 48
36 10
37 38
38 58
39 56
40 26
41 42
42 94
43 44
44 78
45 69
46 70
47 48
48 10
49 57
50 6
51 72
52 14
53 54
54 91
55 72
56 78
57 80
58 30
59 60
60 140
61 62
62 94
63 32
64 1
65 84
66 142
67 68
68 86

List of values

[1, 1, 4, 1, 6, 10, 8, 1, 4, 6, 12, 10, 14, 22, 24, 1, 18, 10, 20, 26, 32, 34, 24, 10, 6, 14, 31, 22, 30, 60, 32, 1, 48, 18, 48, 10, 38, 58, 56, 26, 42, 94, 44, 78, 69, 70, 48, 10, 57, 6, 72, 14, 54, 91, 72, 78, 80, 30, 60, 140, 62, 94, 32, 1, 84, 142, 68, 86]

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

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