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.

A083122 a(1) = 1, then the smallest number not included earlier and not a string of 1's such that the concatenation a(n), a(n+1) is a palindrome.

Table of values

n a(n)
1 1
2 21
3 2
4 12
5 121
6 1121
7 211
8 112
9 1211
10 11121
11 2111
12 1112
13 12111
14 111121
15 21111
16 11112
17 121111
18 1111121
19 211111
20 111112
21 1211111
22 11111121
23 2111111
24 1111112
25 12111111
26 111111121
27 21111111
28 11111112
29 121111111
30 1111111121
31 211111111
32 111111112
33 1211111111

List of values

[1, 21, 2, 12, 121, 1121, 211, 112, 1211, 11121, 2111, 1112, 12111, 111121, 21111, 11112, 121111, 1111121, 211111, 111112, 1211111, 11111121, 2111111, 1111112, 12111111, 111111121, 21111111, 11111112, 121111111, 1111111121, 211111111, 111111112, 1211111111]

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

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