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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.

A267505 Primes p such that p-1 is squarefree and all prime divisors of p-1 other than 13 are also in the sequence.

Table of values

n a(n)
1 2
2 3
3 7
4 43
5 79
6 547
7 3319
8 6163
9 36979
10 42667
11 258847
12 1553119
13 1573207
14 1834639
15 1854763
16 11131927
17 20224159
18 20451679
19 124027567
20 141569107
21 141588763
22 467477683
23 1840398379
24 3278780359
25 5276533183
26 6089163523
27 6155955079
28 11168428363
29 11185512199
30 31655671459

List of values

[2, 3, 7, 43, 79, 547, 3319, 6163, 36979, 42667, 258847, 1553119, 1573207, 1834639, 1854763, 11131927, 20224159, 20451679, 124027567, 141569107, 141588763, 467477683, 1840398379, 3278780359, 5276533183, 6089163523, 6155955079, 11168428363, 11185512199, 31655671459]

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

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