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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.

A381465 Semiprimes k such that 6*k + 1 is also a semiprime.

Table of values

n a(n)
1 4
2 9
3 14
4 15
5 22
6 34
7 39
8 49
9 65
10 69
11 74
12 82
13 85
14 86
15 93
16 94
17 111
18 133
19 145
20 158
21 159
22 183
23 185
24 194
25 201
26 203
27 209
28 214
29 219
30 226
31 235
32 259
33 265
34 267
35 289
36 299
37 301
38 303
39 319
40 321
41 323
42 326
43 327
44 334
45 341
46 346
47 358
48 361
49 362
50 365
51 371
52 377
53 386
54 393
55 403
56 407
57 413
58 415
59 422
60 427
61 437
62 469
63 471

List of values

[4, 9, 14, 15, 22, 34, 39, 49, 65, 69, 74, 82, 85, 86, 93, 94, 111, 133, 145, 158, 159, 183, 185, 194, 201, 203, 209, 214, 219, 226, 235, 259, 265, 267, 289, 299, 301, 303, 319, 321, 323, 326, 327, 334, 341, 346, 358, 361, 362, 365, 371, 377, 386, 393, 403, 407, 413, 415, 422, 427, 437, 469, 471]

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

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