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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.

A339387 a(n) = Sum_{k=1..n} (lcm(n,k)/gcd(n,k) mod k).

Table of values

n a(n)
1 0
2 1
3 1
4 1
5 1
6 6
7 1
8 3
9 1
10 13
11 1
12 16
13 1
14 24
15 30
16 3
17 1
18 39
19 1
20 29
21 31
22 58
23 1
24 72
25 1
26 81
27 10
28 82
29 1
30 148
31 1
32 19
33 120
34 139
35 93
36 55
37 1
38 174
39 88
40 157
41 1
42 279
43 1
44 184
45 168
46 256
47 1
48 160
49 1
50 303
51 282
52 97
53 1
54 372
55 106
56 266
57 181
58 409
59 1
60 582
61 1
62 468
63 211
64 19
65 285
66 763
67 1

List of values

[0, 1, 1, 1, 1, 6, 1, 3, 1, 13, 1, 16, 1, 24, 30, 3, 1, 39, 1, 29, 31, 58, 1, 72, 1, 81, 10, 82, 1, 148, 1, 19, 120, 139, 93, 55, 1, 174, 88, 157, 1, 279, 1, 184, 168, 256, 1, 160, 1, 303, 282, 97, 1, 372, 106, 266, 181, 409, 1, 582, 1, 468, 211, 19, 285, 763, 1]