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.

A272359 Numbers n such that (2^n - 1) / gcd(n, 2^n - 1) is not squarefree.

Table of values

n a(n)
1 364
2 728
3 1092
4 1456
5 1755
6 1820
7 2184
8 2548
9 2912
10 3276
11 3510
12 3640
13 4004
14 4368
15 4732
16 5096
17 5265
18 5460
19 5824
20 6188
21 6552
22 6916
23 7020
24 7280
25 7644
26 8008
27 8372
28 8736
29 8775
30 9100
31 9464
32 9828
33 10192
34 10530
35 10556
36 10920
37 11284
38 11648
39 12012
40 12285
41 12376
42 12740
43 13104
44 13468

List of values

[364, 728, 1092, 1456, 1755, 1820, 2184, 2548, 2912, 3276, 3510, 3640, 4004, 4368, 4732, 5096, 5265, 5460, 5824, 6188, 6552, 6916, 7020, 7280, 7644, 8008, 8372, 8736, 8775, 9100, 9464, 9828, 10192, 10530, 10556, 10920, 11284, 11648, 12012, 12285, 12376, 12740, 13104, 13468]