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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.

A199595 Numbers n such that 3n+6, 3n+7 and 3n+8 are all composite.

Table of values

n a(n)
1 1
2 4
3 9
4 11
5 14
6 18
7 21
8 23
9 24
10 31
11 32
12 33
13 34
14 37
15 40
16 41
17 44
18 46
19 49
20 51
21 54
22 55
23 60
24 61
25 62
26 64
27 65
28 66
29 71
30 74
31 75
32 77
33 79
34 81
35 84
36 88
37 89
38 91
39 92
40 93
41 94
42 99
43 100
44 101
45 102
46 104
47 106
48 107
49 111
50 113
51 114
52 116
53 118
54 121
55 123
56 124
57 127
58 128
59 130
60 131
61 134
62 135
63 138
64 141
65 143
66 144
67 149
68 150
69 151
70 153
71 154
72 157
73 158
74 161
75 163
76 164
77 165
78 168
79 169
80 170

List of values

[1, 4, 9, 11, 14, 18, 21, 23, 24, 31, 32, 33, 34, 37, 40, 41, 44, 46, 49, 51, 54, 55, 60, 61, 62, 64, 65, 66, 71, 74, 75, 77, 79, 81, 84, 88, 89, 91, 92, 93, 94, 99, 100, 101, 102, 104, 106, 107, 111, 113, 114, 116, 118, 121, 123, 124, 127, 128, 130, 131, 134, 135, 138, 141, 143, 144, 149, 150, 151, 153, 154, 157, 158, 161, 163, 164, 165, 168, 169, 170]