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.

A282057 Odd numbers n such that for all k >= 1 the numbers n*4^k - 1 and n*4^k + 1 do not form a twin prime pair.

Table of values

n a(n)
1 5
2 7
3 9
4 11
5 13
6 17
7 19
8 21
9 23
10 25
11 29
12 31
13 35
14 37
15 39
16 41
17 43
18 47
19 49
20 51
21 53
22 55
23 59
24 61
25 65
26 67
27 69
28 71
29 73
30 77
31 79
32 81
33 83
34 85
35 89
36 91
37 95
38 97
39 99
40 101
41 103
42 107
43 109
44 111
45 113
46 115
47 119
48 121

List of values

[5, 7, 9, 11, 13, 17, 19, 21, 23, 25, 29, 31, 35, 37, 39, 41, 43, 47, 49, 51, 53, 55, 59, 61, 65, 67, 69, 71, 73, 77, 79, 81, 83, 85, 89, 91, 95, 97, 99, 101, 103, 107, 109, 111, 113, 115, 119, 121]