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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.

A349659 Sum of the nonrefactorable divisors of n.

Table of values

n a(n)
1 0
2 0
3 3
4 4
5 5
6 9
7 7
8 4
9 3
10 15
11 11
12 13
13 13
14 21
15 23
16 20
17 17
18 9
19 19
20 39
21 31
22 33
23 23
24 13
25 30
26 39
27 30
28 53
29 29
30 69
31 31
32 52
33 47
34 51
35 47
36 13
37 37
38 57
39 55
40 39
41 41
42 93
43 43
44 81
45 68
46 69
47 47
48 77
49 56
50 90
51 71
52 95
53 53
54 90
55 71
56 53
57 79
58 87
59 59
60 93
61 61
62 93
63 94
64 116
65 83
66 141
67 67
68 123
69 95
70 141
71 71

List of values

[0, 0, 3, 4, 5, 9, 7, 4, 3, 15, 11, 13, 13, 21, 23, 20, 17, 9, 19, 39, 31, 33, 23, 13, 30, 39, 30, 53, 29, 69, 31, 52, 47, 51, 47, 13, 37, 57, 55, 39, 41, 93, 43, 81, 68, 69, 47, 77, 56, 90, 71, 95, 53, 90, 71, 53, 79, 87, 59, 93, 61, 93, 94, 116, 83, 141, 67, 123, 95, 141, 71]

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

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