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.

A057719 Prime factors of numbers in A006521 (numbers k that divide 2^k + 1).

Table of values

n a(n)
1 3
2 19
3 163
4 571
5 1459
6 8803
7 9137
8 17497
9 41113
10 52489
11 78787
12 87211
13 135433
14 139483
15 144667
16 164617
17 174763
18 196579
19 274081
20 370009
21 370387
22 478243
23 760267
24 941489
25 944803
26 1041619
27 1220347
28 1236787
29 1319323
30 1465129
31 1663579
32 1994659

List of values

[3, 19, 163, 571, 1459, 8803, 9137, 17497, 41113, 52489, 78787, 87211, 135433, 139483, 144667, 164617, 174763, 196579, 274081, 370009, 370387, 478243, 760267, 941489, 944803, 1041619, 1220347, 1236787, 1319323, 1465129, 1663579, 1994659]