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.

A380985 Numbers whose k-th digit indicates the number of digits which occur k times.

Table of values

n a(n)
1 1
2 20
3 110
4 2100
5 20100
6 200100
7 2000100
8 20000100
9 200000100
10 2000000100
11 20000000100
12 200000000100
13 2000000000100
14 20000000000100
15 200000000000100
16 2000000000000100
17 20000000000000100
18 200000000000000100
19 2000000000000000100
20 20000000000000000100

List of values

[1, 20, 110, 2100, 20100, 200100, 2000100, 20000100, 200000100, 2000000100, 20000000100, 200000000100, 2000000000100, 20000000000100, 200000000000100, 2000000000000100, 20000000000000100, 200000000000000100, 2000000000000000100, 20000000000000000100]

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

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