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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.

A065821 a(n) is the smallest prime ending in exactly n 1's.

Table of values

n a(n)
1 31
2 11
3 2111
4 101111
5 311111
6 29111111
7 61111111
8 1711111111
9 14111111111
10 31111111111
11 311111111111
12 2111111111111
13 31111111111111
14 3511111111111111
15 5111111111111111
16 101111111111111111
17 3511111111111111111
18 2111111111111111111
19 1111111111111111111
20 911111111111111111111

List of values

[31, 11, 2111, 101111, 311111, 29111111, 61111111, 1711111111, 14111111111, 31111111111, 311111111111, 2111111111111, 31111111111111, 3511111111111111, 5111111111111111, 101111111111111111, 3511111111111111111, 2111111111111111111, 1111111111111111111, 911111111111111111111]

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

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