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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.

A082130 Numbers k such that 2*k-1 and 2*k+1 are semiprimes.

Table of values

n a(n)
1 17
2 25
3 28
4 43
5 46
6 47
7 60
8 61
9 71
10 72
11 80
12 92
13 93
14 101
15 102
16 107
17 108
18 109
19 110
20 118
21 124
22 133
23 144
24 145
25 150
26 151
27 152
28 160
29 161
30 164
31 170
32 196
33 197
34 206
35 207
36 208
37 223
38 226
39 235
40 236
41 258
42 259
43 264
44 267
45 268
46 272
47 276
48 290
49 291
50 295
51 317
52 334
53 335
54 340
55 343
56 344

List of values

[17, 25, 28, 43, 46, 47, 60, 61, 71, 72, 80, 92, 93, 101, 102, 107, 108, 109, 110, 118, 124, 133, 144, 145, 150, 151, 152, 160, 161, 164, 170, 196, 197, 206, 207, 208, 223, 226, 235, 236, 258, 259, 264, 267, 268, 272, 276, 290, 291, 295, 317, 334, 335, 340, 343, 344]

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

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