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.

A270390 Greatest common divisor of 2^n-1 and 5^n-1.

Table of values

n a(n)
1 1
2 3
3 1
4 3
5 1
6 63
7 1
8 3
9 1
10 33
11 1
12 819
13 1
14 3
15 31
16 51
17 1
18 3591
19 1
20 1353
21 1
22 69
23 1
24 819
25 1
26 3
27 1
28 87
29 1
30 21483
31 1
32 51
33 1
34 3
35 71
36 1727271
37 1
38 3
39 79
40 1353
41 1
42 2408301
43 1
44 6141
45 31
46 141
47 1
48 13923
49 1
50 8283
51 1
52 159
53 1
54 10773
55 1
56 87
57 1
58 177
59 1
60 698476779
61 1
62 3
63 1
64 32691
65 1

List of values

[1, 3, 1, 3, 1, 63, 1, 3, 1, 33, 1, 819, 1, 3, 31, 51, 1, 3591, 1, 1353, 1, 69, 1, 819, 1, 3, 1, 87, 1, 21483, 1, 51, 1, 3, 71, 1727271, 1, 3, 79, 1353, 1, 2408301, 1, 6141, 31, 141, 1, 13923, 1, 8283, 1, 159, 1, 10773, 1, 87, 1, 177, 1, 698476779, 1, 3, 1, 32691, 1]