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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.

A359954 a(n) = Sum_{d|n} tau(d)*phi(d)*mu(n/d).

Table of values

n a(n)
1 1
2 1
3 3
4 4
5 7
6 3
7 11
8 10
9 14
10 7
11 19
12 12
13 23
14 11
15 21
16 24
17 31
18 14
19 35
20 28
21 33
22 19
23 43
24 30
25 52
26 23
27 54
28 44
29 55
30 21
31 59
32 56
33 57
34 31
35 77
36 56
37 71
38 35
39 69
40 70
41 79
42 33
43 83
44 76
45 98
46 43
47 91
48 72
49 114
50 52
51 93
52 92
53 103
54 54
55 133
56 110
57 105
58 55
59 115
60 84
61 119
62 59
63 154
64 128
65 161
66 57
67 131

List of values

[1, 1, 3, 4, 7, 3, 11, 10, 14, 7, 19, 12, 23, 11, 21, 24, 31, 14, 35, 28, 33, 19, 43, 30, 52, 23, 54, 44, 55, 21, 59, 56, 57, 31, 77, 56, 71, 35, 69, 70, 79, 33, 83, 76, 98, 43, 91, 72, 114, 52, 93, 92, 103, 54, 133, 110, 105, 55, 115, 84, 119, 59, 154, 128, 161, 57, 131]

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

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