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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.

A307390 Primes p such that 2*p-1 is not prime.

Table of values

n a(n)
1 5
2 11
3 13
4 17
5 23
6 29
7 41
8 43
9 47
10 53
11 59
12 61
13 67
14 71
15 73
16 83
17 89
18 101
19 103
20 107
21 109
22 113
23 127
24 131
25 137
26 149
27 151
28 163
29 167
30 173
31 179
32 181
33 191
34 193
35 197
36 223
37 227
38 233
39 239
40 241
41 251
42 257
43 263
44 269
45 277
46 281
47 283
48 293
49 311
50 313
51 317
52 347
53 349
54 353
55 359
56 373
57 383
58 389
59 397
60 401
61 409
62 419
63 421

List of values

[5, 11, 13, 17, 23, 29, 41, 43, 47, 53, 59, 61, 67, 71, 73, 83, 89, 101, 103, 107, 109, 113, 127, 131, 137, 149, 151, 163, 167, 173, 179, 181, 191, 193, 197, 223, 227, 233, 239, 241, 251, 257, 263, 269, 277, 281, 283, 293, 311, 313, 317, 347, 349, 353, 359, 373, 383, 389, 397, 401, 409, 419, 421]