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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.

A348783 Let c(i) be the number of times the digit i appears in n, for 0 <= i <= 9; then a(n) is the concatenation of c(9) c(8) ... c(1) c(0), with leading 0's omitted.

Table of values

n a(n)
0 1
1 10
2 100
3 1000
4 10000
5 100000
6 1000000
7 10000000
8 100000000
9 1000000000
10 11
11 20
12 110
13 1010
14 10010
15 100010
16 1000010
17 10000010
18 100000010
19 1000000010
20 101
21 110
22 200
23 1100
24 10100
25 100100
26 1000100
27 10000100
28 100000100
29 1000000100
30 1001
31 1010
32 1100
33 2000
34 11000

List of values

[1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 100000000, 1000000000, 11, 20, 110, 1010, 10010, 100010, 1000010, 10000010, 100000010, 1000000010, 101, 110, 200, 1100, 10100, 100100, 1000100, 10000100, 100000100, 1000000100, 1001, 1010, 1100, 2000, 11000]

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

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