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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.

A067063 Smallest prime factor of repunit(n) = (10^n-1)/9 (A002275).

Table of values

n a(n)
2 11
3 3
4 11
5 41
6 3
7 239
8 11
9 3
10 11
11 21649
12 3
13 53
14 11
15 3
16 11
17 2071723
18 3
19 1111111111111111111
20 11
21 3
22 11
23 11111111111111111111111
24 3
25 41
26 11
27 3
28 11
29 3191
30 3
31 2791
32 11
33 3
34 11
35 41
36 3
37 2028119
38 11
39 3
40 11
41 83
42 3
43 173
44 11
45 3
46 11
47 35121409
48 3
49 239

List of values

[11, 3, 11, 41, 3, 239, 11, 3, 11, 21649, 3, 53, 11, 3, 11, 2071723, 3, 1111111111111111111, 11, 3, 11, 11111111111111111111111, 3, 41, 11, 3, 11, 3191, 3, 2791, 11, 3, 11, 41, 3, 2028119, 11, 3, 11, 83, 3, 173, 11, 3, 11, 35121409, 3, 239]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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