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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.

A334579 a(n) = Sum_{d|n} gcd(tau(d), sigma(d)).

Table of values

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

List of values

[1, 2, 3, 3, 3, 8, 3, 4, 4, 6, 3, 11, 3, 8, 9, 5, 3, 12, 3, 13, 9, 8, 3, 16, 4, 6, 8, 11, 3, 24, 3, 8, 9, 6, 9, 16, 3, 8, 9, 16, 3, 26, 3, 15, 16, 8, 3, 19, 6, 10, 9, 9, 3, 24, 9, 20, 9, 6, 3, 45, 3, 8, 12, 9, 9, 26, 3, 13, 9, 24, 3, 24, 3, 6, 12, 11, 9, 24, 3]