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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.

A177210 Numbers k that are the products of two distinct primes such that 2*k-1 are also products of two distinct primes.

Table of values

n a(n)
1 26
2 33
3 35
4 39
5 46
6 58
7 62
8 65
9 93
10 94
11 111
12 118
13 119
14 133
15 134
16 146
17 155
18 161
19 178
20 183
21 202
22 206
23 209
24 214
25 219
26 226
27 235
28 237
29 247
30 249
31 253
32 259
33 267
34 287
35 291
36 295
37 299
38 334
39 335
40 341
41 362
42 377
43 382
44 386
45 391
46 393
47 395
48 407
49 422
50 445
51 447
52 451
53 453
54 478

List of values

[26, 33, 35, 39, 46, 58, 62, 65, 93, 94, 111, 118, 119, 133, 134, 146, 155, 161, 178, 183, 202, 206, 209, 214, 219, 226, 235, 237, 247, 249, 253, 259, 267, 287, 291, 295, 299, 334, 335, 341, 362, 377, 382, 386, 391, 393, 395, 407, 422, 445, 447, 451, 453, 478]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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