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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.

A319131 a(n) = Sum_{d|n} Sum_{p|d, p prime} p.

Table of values

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

List of values

[0, 2, 3, 4, 5, 10, 7, 6, 6, 14, 11, 17, 13, 18, 16, 8, 17, 18, 19, 23, 20, 26, 23, 24, 10, 30, 9, 29, 29, 40, 31, 10, 28, 38, 24, 30, 37, 42, 32, 32, 41, 48, 43, 41, 27, 50, 47, 31, 14, 26, 40, 47, 53, 26, 32, 40, 44, 62, 59, 64, 61, 66, 33, 12, 36, 64, 67, 59, 52, 56]

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

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