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.

A104278 Numbers m such that 2m+1 and 2m-1 are not primes.

Table of values

n a(n)
1 13
2 17
3 25
4 28
5 32
6 38
7 43
8 46
9 47
10 58
11 59
12 60
13 61
14 62
15 67
16 71
17 72
18 73
19 77
20 80
21 85
22 88
23 92
24 93
25 94
26 101
27 102
28 103
29 104
30 107
31 108
32 109
33 110
34 118
35 122
36 123
37 124
38 127
39 130
40 133
41 137
42 143
43 144
44 145
45 148
46 149
47 150
48 151
49 152
50 160
51 161
52 162
53 163
54 164
55 167
56 170
57 171
58 172

List of values

[13, 17, 25, 28, 32, 38, 43, 46, 47, 58, 59, 60, 61, 62, 67, 71, 72, 73, 77, 80, 85, 88, 92, 93, 94, 101, 102, 103, 104, 107, 108, 109, 110, 118, 122, 123, 124, 127, 130, 133, 137, 143, 144, 145, 148, 149, 150, 151, 152, 160, 161, 162, 163, 164, 167, 170, 171, 172]