cp's OEIS Frontend

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.

A215504 Prime numbers p such that p^2 - 1 has exactly one distinct prime factor other than 2 and 3.

Table of values

n a(n)
1 11
2 13
3 19
4 23
5 31
6 37
7 47
8 53
9 73
10 97
11 107
12 127
13 163
14 193
15 257
16 383
17 487
18 577
19 863
20 1153
21 2593
22 2917
23 4373
24 8747
25 995327
26 1492993
27 1990657
28 5308417
29 28311553
30 86093443
31 6879707137
32 1761205026817
33 2348273369087
34 5566277615617
35 7421703487487
36 21422803359743

List of values

[11, 13, 19, 23, 31, 37, 47, 53, 73, 97, 107, 127, 163, 193, 257, 383, 487, 577, 863, 1153, 2593, 2917, 4373, 8747, 995327, 1492993, 1990657, 5308417, 28311553, 86093443, 6879707137, 1761205026817, 2348273369087, 5566277615617, 7421703487487, 21422803359743]

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

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