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.

A253953 Numbers that require three steps to collapse to a single digit in base 4 (written in base 4).

Table of values

n a(n)
1 223
2 1213
3 2023
4 2122
5 2203
6 2221
7 3133
8 11113
9 12103
10 13033
11 20023
12 20203
13 20221
14 21202
15 22003
16 22021
17 22201
18 22333
19 30313
20 31033
21 31132
22 103033
23 110113
24 111103
25 113032
26 121003
27 200023
28 200203
29 200221
30 202003
31 202021

List of values

[223, 1213, 2023, 2122, 2203, 2221, 3133, 11113, 12103, 13033, 20023, 20203, 20221, 21202, 22003, 22021, 22201, 22333, 30313, 31033, 31132, 103033, 110113, 111103, 113032, 121003, 200023, 200203, 200221, 202003, 202021]

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

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