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.

A111168 Semiprimes n such that 2*n - 1 is also a semiprime.

Table of values

n a(n)
1 25
2 26
3 33
4 35
5 39
6 46
7 58
8 62
9 65
10 85
11 93
12 94
13 111
14 118
15 119
16 133
17 134
18 145
19 146
20 155
21 161
22 178
23 183
24 202
25 206
26 209
27 214
28 219
29 226
30 235
31 237
32 247
33 249
34 253
35 259
36 265
37 267
38 287
39 291
40 295
41 299
42 334
43 335
44 341
45 361
46 362
47 377
48 382
49 386
50 391
51 393
52 395
53 407
54 422

List of values

[25, 26, 33, 35, 39, 46, 58, 62, 65, 85, 93, 94, 111, 118, 119, 133, 134, 145, 146, 155, 161, 178, 183, 202, 206, 209, 214, 219, 226, 235, 237, 247, 249, 253, 259, 265, 267, 287, 291, 295, 299, 334, 335, 341, 361, 362, 377, 382, 386, 391, 393, 395, 407, 422]