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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.

A368742 a(n) = Sum_{k = 1..n} gcd(6*k, n).

Table of values

n a(n)
1 1
2 4
3 9
4 12
5 9
6 36
7 13
8 32
9 45
10 36
11 21
12 108
13 25
14 52
15 81
16 80
17 33
18 180
19 37
20 108
21 117
22 84
23 45
24 288
25 65
26 100
27 189
28 156
29 57
30 324
31 61
32 192
33 189
34 132
35 117
36 540
37 73
38 148
39 225
40 288
41 81
42 468
43 85
44 252
45 405
46 180
47 93
48 720
49 133
50 260
51 297
52 300
53 105
54 756
55 189
56 416
57 333
58 228
59 117
60 972
61 121
62 244
63 585
64 448

List of values

[1, 4, 9, 12, 9, 36, 13, 32, 45, 36, 21, 108, 25, 52, 81, 80, 33, 180, 37, 108, 117, 84, 45, 288, 65, 100, 189, 156, 57, 324, 61, 192, 189, 132, 117, 540, 73, 148, 225, 288, 81, 468, 85, 252, 405, 180, 93, 720, 133, 260, 297, 300, 105, 756, 189, 416, 333, 228, 117, 972, 121, 244, 585, 448]

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

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