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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.

A338750 a(n) = 1 + Sum_{k=1..n-1} a(gcd(n,k)).

Table of values

n a(n)
1 1
2 2
3 3
4 5
5 5
6 10
7 7
8 14
9 13
10 18
11 11
12 35
13 13
14 26
15 31
16 41
17 17
18 58
19 19
20 65
21 45
22 42
23 23
24 122
25 41
26 50
27 63
28 95
29 29
30 154
31 31
32 122
33 73
34 66
35 83
36 241
37 37
38 74
39 87
40 230
41 41
42 226
43 43
44 155
45 193
46 90
47 47
48 419
49 85
50 194
51 115
52 185
53 53
54 338
55 135
56 338
57 129
58 114
59 59
60 679
61 61
62 122
63 283

List of values

[1, 2, 3, 5, 5, 10, 7, 14, 13, 18, 11, 35, 13, 26, 31, 41, 17, 58, 19, 65, 45, 42, 23, 122, 41, 50, 63, 95, 29, 154, 31, 122, 73, 66, 83, 241, 37, 74, 87, 230, 41, 226, 43, 155, 193, 90, 47, 419, 85, 194, 115, 185, 53, 338, 135, 338, 129, 114, 59, 679, 61, 122, 283]