cp's OEIS Frontend

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.

A039769 Composite integers k such that gcd(phi(k), k - 1) > 1.

Table of values

n a(n)
1 9
2 15
3 21
4 25
5 27
6 28
7 33
8 35
9 39
10 45
11 49
12 51
13 52
14 55
15 57
16 63
17 65
18 66
19 69
20 70
21 75
22 76
23 77
24 81
25 85
26 87
27 91
28 93
29 95
30 99
31 105
32 111
33 112
34 115
35 117
36 119
37 121
38 123
39 124
40 125
41 129
42 130
43 133
44 135
45 141
46 143
47 145
48 147
49 148
50 153
51 154
52 155
53 159
54 161
55 165
56 169
57 171
58 172
59 175

List of values

[9, 15, 21, 25, 27, 28, 33, 35, 39, 45, 49, 51, 52, 55, 57, 63, 65, 66, 69, 70, 75, 76, 77, 81, 85, 87, 91, 93, 95, 99, 105, 111, 112, 115, 117, 119, 121, 123, 124, 125, 129, 130, 133, 135, 141, 143, 145, 147, 148, 153, 154, 155, 159, 161, 165, 169, 171, 172, 175]