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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.

A055632 Sum of totient function of primes dividing n is a prime.

Table of values

n a(n)
1 3
2 6
3 9
4 10
5 12
6 14
7 18
8 20
9 22
10 24
11 26
12 27
13 28
14 30
15 34
16 36
17 38
18 40
19 44
20 46
21 48
22 50
23 52
24 54
25 56
26 58
27 60
28 62
29 66
30 68
31 70
32 72
33 74
34 76
35 80
36 81
37 82
38 86
39 88
40 90
41 92
42 94
43 96
44 98
45 100
46 102
47 104
48 106
49 108
50 112
51 116
52 118
53 120
54 122
55 124
56 130
57 132
58 134
59 136
60 140
61 142
62 144
63 146

List of values

[3, 6, 9, 10, 12, 14, 18, 20, 22, 24, 26, 27, 28, 30, 34, 36, 38, 40, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, 66, 68, 70, 72, 74, 76, 80, 81, 82, 86, 88, 90, 92, 94, 96, 98, 100, 102, 104, 106, 108, 112, 116, 118, 120, 122, 124, 130, 132, 134, 136, 140, 142, 144, 146]

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

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