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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.

A075278 Interprimes which are of the form s*prime, s=3.

Table of values

n a(n)
1 6
2 9
3 15
4 21
5 39
6 69
7 93
8 111
9 129
10 309
11 381
12 393
13 453
14 489
15 501
16 687
17 723
18 771
19 879
20 933
21 939
22 1011
23 1167
24 1299
25 1527
26 1563
27 1569
28 1839
29 1941
30 1983
31 2157
32 2217
33 2229
34 2271
35 2391
36 2463
37 2661
38 2811
39 2859
40 2913
41 3039
42 3099
43 3189
44 3453
45 3459
46 3651
47 3849

List of values

[6, 9, 15, 21, 39, 69, 93, 111, 129, 309, 381, 393, 453, 489, 501, 687, 723, 771, 879, 933, 939, 1011, 1167, 1299, 1527, 1563, 1569, 1839, 1941, 1983, 2157, 2217, 2229, 2271, 2391, 2463, 2661, 2811, 2859, 2913, 3039, 3099, 3189, 3453, 3459, 3651, 3849]