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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.

A008330 phi(p-1), as p runs through the primes.

Table of values

n a(n)
1 1
2 1
3 2
4 2
5 4
6 4
7 8
8 6
9 10
10 12
11 8
12 12
13 16
14 12
15 22
16 24
17 28
18 16
19 20
20 24
21 24
22 24
23 40
24 40
25 32
26 40
27 32
28 52
29 36
30 48
31 36
32 48
33 64
34 44
35 72
36 40
37 48
38 54
39 82
40 84
41 88
42 48
43 72
44 64
45 84
46 60
47 48
48 72
49 112
50 72
51 112
52 96
53 64
54 100
55 128
56 130
57 132
58 72
59 88
60 96
61 92
62 144
63 96
64 120
65 96
66 156
67 80
68 96
69 172
70 112

List of values

[1, 1, 2, 2, 4, 4, 8, 6, 10, 12, 8, 12, 16, 12, 22, 24, 28, 16, 20, 24, 24, 24, 40, 40, 32, 40, 32, 52, 36, 48, 36, 48, 64, 44, 72, 40, 48, 54, 82, 84, 88, 48, 72, 64, 84, 60, 48, 72, 112, 72, 112, 96, 64, 100, 128, 130, 132, 72, 88, 96, 92, 144, 96, 120, 96, 156, 80, 96, 172, 112]

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