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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.

A339465 Primes p such that (p-1)/gpf(p-1) = 2^q * 3^r with q, r >= 1, where gpf(m) is the greatest prime factor of m, A006530.

Table of values

n a(n)
1 19
2 31
3 37
4 43
5 61
6 67
7 73
8 79
9 103
10 109
11 127
12 139
13 157
14 163
15 181
16 199
17 223
18 229
19 241
20 271
21 277
22 283
23 307
24 313
25 337
26 349
27 367
28 373
29 379
30 397
31 409
32 433
33 439
34 457
35 487
36 499
37 523
38 541
39 577
40 607
41 613
42 619
43 643
44 673
45 709
46 733
47 739
48 757
49 787
50 811
51 823
52 829
53 853
54 877
55 907
56 919

List of values

[19, 31, 37, 43, 61, 67, 73, 79, 103, 109, 127, 139, 157, 163, 181, 199, 223, 229, 241, 271, 277, 283, 307, 313, 337, 349, 367, 373, 379, 397, 409, 433, 439, 457, 487, 499, 523, 541, 577, 607, 613, 619, 643, 673, 709, 733, 739, 757, 787, 811, 823, 829, 853, 877, 907, 919]

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

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