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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.

A174147 a(n) = n-th sum{p-1|p is prime and divisor of n} plus n-th product{p-1|p is prime and divisor of n}.

Table of values

n a(n)
1 0
2 2
3 4
4 2
5 8
6 5
7 12
8 2
9 4
10 9
11 20
12 5
13 24
14 13
15 14
16 2
17 32
18 5
19 36
20 9
21 20
22 21
23 44
24 5
25 8
26 25
27 4
28 13
29 56
30 15
31 60
32 2
33 32
34 33
35 34
36 5
37 72
38 37
39 38
40 9
41 80
42 21
43 84
44 21
45 14
46 45
47 92
48 5
49 12
50 9
51 50
52 25
53 104
54 5
55 54
56 13
57 56
58 57
59 116
60 15
61 120
62 61
63 20
64 2
65 64
66 33
67 132
68 33
69 68
70 35
71 140
72 5
73 144
74 73
75 14

List of values

[0, 2, 4, 2, 8, 5, 12, 2, 4, 9, 20, 5, 24, 13, 14, 2, 32, 5, 36, 9, 20, 21, 44, 5, 8, 25, 4, 13, 56, 15, 60, 2, 32, 33, 34, 5, 72, 37, 38, 9, 80, 21, 84, 21, 14, 45, 92, 5, 12, 9, 50, 25, 104, 5, 54, 13, 56, 57, 116, 15, 120, 61, 20, 2, 64, 33, 132, 33, 68, 35, 140, 5, 144, 73, 14]

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