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.

A166747 Numbers with n digits from the set {1,2,4}, requiring a nondecreasing sequence of digits and a digits sum of A008578(n).

Table of values

n a(n)
1 1
2 11
3 111
4 1112
5 11122
6 122222
7 1222222
8 12222224
9 122222224
10 1222222244
11 12222224444
12 122222224444
13 1222222444444
14 12222224444444
15 122222224444444
16 1222222244444444
17 12222224444444444
18 122222444444444444
19 1222222444444444444
20 12222244444444444444

List of values

[1, 11, 111, 1112, 11122, 122222, 1222222, 12222224, 122222224, 1222222244, 12222224444, 122222224444, 1222222444444, 12222224444444, 122222224444444, 1222222244444444, 12222224444444444, 122222444444444444, 1222222444444444444, 12222244444444444444]

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

Content is available under The OEIS End-User License Agreement.