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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.

A064947 a(n) = Sum_{i|n, j|n, j>i} i.

Table of values

n a(n)
1 0
2 1
3 1
4 4
5 1
6 10
7 1
8 11
9 5
10 12
11 1
12 36
13 1
14 14
15 14
16 26
17 1
18 43
19 1
20 45
21 16
22 18
23 1
24 96
25 7
26 20
27 18
28 53
29 1
30 107
31 1
32 57
33 20
34 24
35 20
36 153
37 1
38 26
39 22
40 123
41 1
42 128
43 1
44 69
45 65
46 30
47 1
48 224
49 9
50 73
51 26
52 77
53 1
54 148
55 24
56 147
57 28
58 36
59 1
60 374
61 1
62 38
63 77
64 120
65 26
66 168
67 1
68 93
69 32
70 165
71 1
72 411
73 1
74 44

List of values

[0, 1, 1, 4, 1, 10, 1, 11, 5, 12, 1, 36, 1, 14, 14, 26, 1, 43, 1, 45, 16, 18, 1, 96, 7, 20, 18, 53, 1, 107, 1, 57, 20, 24, 20, 153, 1, 26, 22, 123, 1, 128, 1, 69, 65, 30, 1, 224, 9, 73, 26, 77, 1, 148, 24, 147, 28, 36, 1, 374, 1, 38, 77, 120, 26, 168, 1, 93, 32, 165, 1, 411, 1, 44]