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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.

A058501 Primes p such that largest odd factor of p-1 is not a prime (i.e., is composite or 1).

Table of values

n a(n)
1 2
2 3
3 5
4 17
5 19
6 31
7 37
8 43
9 61
10 67
11 71
12 73
13 79
14 101
15 103
16 109
17 127
18 131
19 139
20 151
21 157
22 163
23 181
24 191
25 197
26 199
27 211
28 223
29 229
30 239
31 241
32 251
33 257
34 271
35 277
36 281
37 283
38 307
39 311
40 313
41 331
42 337
43 349
44 367
45 373
46 379
47 397
48 401
49 409
50 419
51 421
52 431
53 433
54 439
55 443

List of values

[2, 3, 5, 17, 19, 31, 37, 43, 61, 67, 71, 73, 79, 101, 103, 109, 127, 131, 139, 151, 157, 163, 181, 191, 197, 199, 211, 223, 229, 239, 241, 251, 257, 271, 277, 281, 283, 307, 311, 313, 331, 337, 349, 367, 373, 379, 397, 401, 409, 419, 421, 431, 433, 439, 443]