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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.

A062402 a(n) = sigma(phi(n)).

Table of values

n a(n)
1 1
2 1
3 3
4 3
5 7
6 3
7 12
8 7
9 12
10 7
11 18
12 7
13 28
14 12
15 15
16 15
17 31
18 12
19 39
20 15
21 28
22 18
23 36
24 15
25 42
26 28
27 39
28 28
29 56
30 15
31 72
32 31
33 42
34 31
35 60
36 28
37 91
38 39
39 60
40 31
41 90
42 28
43 96
44 42
45 60
46 36
47 72
48 31
49 96
50 42
51 63
52 60
53 98
54 39
55 90
56 60
57 91
58 56
59 90
60 31
61 168
62 72
63 91
64 63
65 124
66 42
67 144
68 63
69 84
70 60
71 144

List of values

[1, 1, 3, 3, 7, 3, 12, 7, 12, 7, 18, 7, 28, 12, 15, 15, 31, 12, 39, 15, 28, 18, 36, 15, 42, 28, 39, 28, 56, 15, 72, 31, 42, 31, 60, 28, 91, 39, 60, 31, 90, 28, 96, 42, 60, 36, 72, 31, 96, 42, 63, 60, 98, 39, 90, 60, 91, 56, 90, 31, 168, 72, 91, 63, 124, 42, 144, 63, 84, 60, 144]

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

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