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.

A111170 Semiprimes S such that 3*S + 1 is also a semiprime.

Table of values

n a(n)
1 15
2 35
3 38
4 39
5 55
6 62
7 82
8 86
9 87
10 91
11 106
12 111
13 115
14 118
15 119
16 134
17 142
18 155
19 159
20 178
21 187
22 194
23 218
24 226
25 235
26 254
27 259
28 267
29 278
30 287
31 295
32 298
33 299
34 314
35 319
36 326
37 327
38 334
39 335
40 339
41 371
42 382
43 386
44 391
45 395
46 398
47 411
48 422
49 427
50 446
51 451
52 454
53 502
54 515

List of values

[15, 35, 38, 39, 55, 62, 82, 86, 87, 91, 106, 111, 115, 118, 119, 134, 142, 155, 159, 178, 187, 194, 218, 226, 235, 254, 259, 267, 278, 287, 295, 298, 299, 314, 319, 326, 327, 334, 335, 339, 371, 382, 386, 391, 395, 398, 411, 422, 427, 446, 451, 454, 502, 515]