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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.

A122492 Semiprimes k such that 1 + 2k + 3k^2 is also semiprime.

Table of values

n a(n)
1 4
2 6
3 9
4 10
5 15
6 21
7 22
8 33
9 35
10 57
11 69
12 77
13 82
14 86
15 95
16 111
17 123
18 134
19 143
20 146
21 161
22 183
23 202
24 203
25 209
26 218
27 219
28 221
29 249
30 262
31 267
32 298
33 299
34 302
35 314
36 321
37 323
38 326
39 329
40 334
41 335
42 339
43 341
44 417
45 422
46 446
47 454
48 471
49 489
50 515
51 543
52 551
53 554
54 562
55 566
56 573

List of values

[4, 6, 9, 10, 15, 21, 22, 33, 35, 57, 69, 77, 82, 86, 95, 111, 123, 134, 143, 146, 161, 183, 202, 203, 209, 218, 219, 221, 249, 262, 267, 298, 299, 302, 314, 321, 323, 326, 329, 334, 335, 339, 341, 417, 422, 446, 454, 471, 489, 515, 543, 551, 554, 562, 566, 573]