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.

A223077 Positive integers, written in base 3, with the property that if the base-3 representation is reversed the result is twice the original number.

Table of values

n a(n)
1 1012
2 10212
3 102212
4 1022212
5 10121012
6 10222212
7 101201012
8 102222212
9 1012001012
10 1021210212
11 1022222212
12 10120001012
13 10212010212
14 10222222212
15 101200001012
16 101210121012
17 102120010212
18 102212102212
19 102222222212
20 1012000001012
21 1012102121012
22 1021200010212
23 1022120102212
24 1022222222212

List of values

[1012, 10212, 102212, 1022212, 10121012, 10222212, 101201012, 102222212, 1012001012, 1021210212, 1022222212, 10120001012, 10212010212, 10222222212, 101200001012, 101210121012, 102120010212, 102212102212, 102222222212, 1012000001012, 1012102121012, 1021200010212, 1022120102212, 1022222222212]

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

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