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.

A137715 Prime values of n for which n*2^k + 1 is composite for all positive integers k.

Table of values

n a(n)
1 271129
2 322523
3 327739
4 482719
5 934909
6 1639459
7 2131043
8 2131099
9 2576089
10 3098059
11 3608251
12 4573999
13 6678713
14 6799831
15 7523281
16 7761437
17 8184977
18 8840599
19 8879993
20 8959163
21 9208337
22 9252323
23 9930469
24 9937637
25 10192733
26 10306187
27 10391933
28 11206501

List of values

[271129, 322523, 327739, 482719, 934909, 1639459, 2131043, 2131099, 2576089, 3098059, 3608251, 4573999, 6678713, 6799831, 7523281, 7761437, 8184977, 8840599, 8879993, 8959163, 9208337, 9252323, 9930469, 9937637, 10192733, 10306187, 10391933, 11206501]