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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.

A199716 Numbers k such that 6k-5 and 6k-1 are both composite.

Table of values

n a(n)
1 16
2 20
3 21
4 35
5 37
6 50
7 51
8 54
9 55
10 61
11 66
12 68
13 76
14 79
15 81
16 83
17 86
18 89
19 90
20 105
21 112
22 115
23 118
24 121
25 125
26 128
27 130
28 131
29 134
30 141
31 142
32 145
33 146
34 149
35 150
36 151
37 153
38 156
39 160
40 161
41 165
42 168
43 180
44 181
45 186
46 190
47 191
48 195
49 200
50 202
51 208
52 211
53 212
54 219
55 223

List of values

[16, 20, 21, 35, 37, 50, 51, 54, 55, 61, 66, 68, 76, 79, 81, 83, 86, 89, 90, 105, 112, 115, 118, 121, 125, 128, 130, 131, 134, 141, 142, 145, 146, 149, 150, 151, 153, 156, 160, 161, 165, 168, 180, 181, 186, 190, 191, 195, 200, 202, 208, 211, 212, 219, 223]