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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.

A053312 a(n) contains n digits (either '1' or '2') and is divisible by 2^n.

Table of values

n a(n)
1 2
2 12
3 112
4 2112
5 22112
6 122112
7 2122112
8 12122112
9 212122112
10 1212122112
11 11212122112
12 111212122112
13 1111212122112
14 11111212122112
15 211111212122112
16 1211111212122112
17 11211111212122112
18 111211111212122112
19 2111211111212122112
20 12111211111212122112

List of values

[2, 12, 112, 2112, 22112, 122112, 2122112, 12122112, 212122112, 1212122112, 11212122112, 111212122112, 1111212122112, 11111212122112, 211111212122112, 1211111212122112, 11211111212122112, 111211111212122112, 2111211111212122112, 12111211111212122112]

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

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