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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.

A178456 Primes p such that p-1 or p+1 has more than two distinct prime divisors.

Table of values

n a(n)
1 29
2 31
3 41
4 43
5 59
6 61
7 67
8 71
9 79
10 83
11 89
12 101
13 103
14 109
15 113
16 127
17 131
18 137
19 139
20 149
21 151
22 157
23 167
24 173
25 179
26 181
27 191
28 197
29 199
30 211
31 223
32 227
33 229
34 233
35 239
36 241
37 251
38 257
39 263
40 269
41 271
42 277
43 281
44 283
45 293
46 307
47 311
48 313
49 317
50 331
51 337
52 347
53 349
54 353
55 359
56 367
57 373
58 379
59 389

List of values

[29, 31, 41, 43, 59, 61, 67, 71, 79, 83, 89, 101, 103, 109, 113, 127, 131, 137, 139, 149, 151, 157, 167, 173, 179, 181, 191, 197, 199, 211, 223, 227, 229, 233, 239, 241, 251, 257, 263, 269, 271, 277, 281, 283, 293, 307, 311, 313, 317, 331, 337, 347, 349, 353, 359, 367, 373, 379, 389]

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

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