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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.

A001270 Table of prime factors of 10^n - 1 (with multiplicity).

Table of values

n a(n)
1 3
2 3
3 3
4 3
5 11
6 3
7 3
8 3
9 37
10 3
11 3
12 11
13 101
14 3
15 3
16 41
17 271
18 3
19 3
20 3
21 7
22 11
23 13
24 37
25 3
26 3
27 239
28 4649
29 3
30 3
31 11
32 73
33 101
34 137
35 3
36 3
37 3
38 3
39 37
40 333667
41 3
42 3
43 11
44 41
45 271
46 9091
47 3
48 3
49 21649
50 513239
51 3
52 3
53 3
54 7
55 11
56 13
57 37
58 101
59 9901
60 3
61 3
62 53
63 79
64 265371653

List of values

[3, 3, 3, 3, 11, 3, 3, 3, 37, 3, 3, 11, 101, 3, 3, 41, 271, 3, 3, 3, 7, 11, 13, 37, 3, 3, 239, 4649, 3, 3, 11, 73, 101, 137, 3, 3, 3, 3, 37, 333667, 3, 3, 11, 41, 271, 9091, 3, 3, 21649, 513239, 3, 3, 3, 7, 11, 13, 37, 101, 9901, 3, 3, 53, 79, 265371653]