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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.

A079535 a(n) = phi(n)*d(n) - n.

Table of values

n a(n)
1 0
2 0
3 1
4 2
5 3
6 2
7 5
8 8
9 9
10 6
11 9
12 12
13 11
14 10
15 17
16 24
17 15
18 18
19 17
20 28
21 27
22 18
23 21
24 40
25 35
26 22
27 45
28 44
29 27
30 34
31 29
32 64
33 47
34 30
35 61
36 72
37 35
38 34
39 57
40 88
41 39
42 54
43 41
44 76
45 99
46 42
47 45
48 112
49 77
50 70
51 77
52 92
53 51
54 90
55 105
56 136
57 87
58 54
59 57
60 132
61 59
62 58
63 153
64 160
65 127
66 94
67 65
68 124
69 107
70 122
71 69

List of values

[0, 0, 1, 2, 3, 2, 5, 8, 9, 6, 9, 12, 11, 10, 17, 24, 15, 18, 17, 28, 27, 18, 21, 40, 35, 22, 45, 44, 27, 34, 29, 64, 47, 30, 61, 72, 35, 34, 57, 88, 39, 54, 41, 76, 99, 42, 45, 112, 77, 70, 77, 92, 51, 90, 105, 136, 87, 54, 57, 132, 59, 58, 153, 160, 127, 94, 65, 124, 107, 122, 69]

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

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