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.

A066071 Nonprime numbers k such that phi(k) + 1 is prime.

Table of values

n a(n)
1 1
2 4
3 6
4 8
5 9
6 10
7 12
8 14
9 18
10 21
11 22
12 26
13 27
14 28
15 32
16 34
17 36
18 38
19 40
20 42
21 46
22 48
23 49
24 54
25 55
26 57
27 58
28 60
29 62
30 63
31 74
32 75
33 76
34 77
35 82
36 86
37 88
38 91
39 93
40 94
41 95
42 98
43 99
44 100
45 106
46 108
47 110
48 111
49 114
50 115
51 117
52 118
53 119
54 122
55 124
56 125
57 126
58 132
59 133
60 134
61 135
62 142
63 145
64 146

List of values

[1, 4, 6, 8, 9, 10, 12, 14, 18, 21, 22, 26, 27, 28, 32, 34, 36, 38, 40, 42, 46, 48, 49, 54, 55, 57, 58, 60, 62, 63, 74, 75, 76, 77, 82, 86, 88, 91, 93, 94, 95, 98, 99, 100, 106, 108, 110, 111, 114, 115, 117, 118, 119, 122, 124, 125, 126, 132, 133, 134, 135, 142, 145, 146]