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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.

A078182 a(n) = Sum_{d|n, d == 2 (mod 3)} d.

Table of values

n a(n)
1 0
2 2
3 0
4 2
5 5
6 2
7 0
8 10
9 0
10 7
11 11
12 2
13 0
14 16
15 5
16 10
17 17
18 2
19 0
20 27
21 0
22 13
23 23
24 10
25 5
26 28
27 0
28 16
29 29
30 7
31 0
32 42
33 11
34 19
35 40
36 2
37 0
38 40
39 0
40 35
41 41
42 16
43 0
44 57
45 5
46 25
47 47
48 10
49 0
50 57
51 17
52 28
53 53
54 2
55 16
56 80
57 0
58 31
59 59
60 27
61 0
62 64
63 0
64 42
65 70
66 13
67 0
68 87
69 23
70 56
71 71
72 10
73 0
74 76
75 5
76 40
77 88
78 28
79 0
80 115

List of values

[0, 2, 0, 2, 5, 2, 0, 10, 0, 7, 11, 2, 0, 16, 5, 10, 17, 2, 0, 27, 0, 13, 23, 10, 5, 28, 0, 16, 29, 7, 0, 42, 11, 19, 40, 2, 0, 40, 0, 35, 41, 16, 0, 57, 5, 25, 47, 10, 0, 57, 17, 28, 53, 2, 16, 80, 0, 31, 59, 27, 0, 64, 0, 42, 70, 13, 0, 87, 23, 56, 71, 10, 0, 76, 5, 40, 88, 28, 0, 115]

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