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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.

A069170 Values of phi(k)*Sum_{d|k} 1/phi(d) for nonprimes k.

Table of values

n a(n)
1 1
2 5
3 6
4 11
5 10
6 10
7 15
8 14
9 15
10 23
11 20
12 25
13 21
14 22
15 33
16 26
17 26
18 31
19 35
20 30
21 47
22 33
23 34
24 35
25 50
26 38
27 39
28 55
29 42
30 55
31 50
32 46
33 69
34 50
35 52
36 51
37 65
38 62
39 55
40 77
41 57
42 58
43 75
44 62
45 70
46 95
47 65
48 66
49 85
50 69
51 70
52 110
53 74
54 78
55 95
56 77
57 78
58 115
59 94
60 82
61 105
62 85
63 86
64 87
65 121
66 100
67 91
68 115

List of values

[1, 5, 6, 11, 10, 10, 15, 14, 15, 23, 20, 25, 21, 22, 33, 26, 26, 31, 35, 30, 47, 33, 34, 35, 50, 38, 39, 55, 42, 55, 50, 46, 69, 50, 52, 51, 65, 62, 55, 77, 57, 58, 75, 62, 70, 95, 65, 66, 85, 69, 70, 110, 74, 78, 95, 77, 78, 115, 94, 82, 105, 85, 86, 87, 121, 100, 91, 115]

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