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.

A090103 n written in base equal to the number of distinct prime factors of n and a(1)=0.

Table of values

n a(n)
1 0
2 11
3 111
4 1111
5 11111
6 110
7 1111111
8 11111111
9 111111111
10 1010
11 11111111111
12 1100
13 1111111111111
14 1110
15 1111
16 1111111111111111
17 11111111111111111
18 10010
19 1111111111111111111
20 10100
21 10101
22 10110
23 11111111111111111111111
24 11000

List of values

[0, 11, 111, 1111, 11111, 110, 1111111, 11111111, 111111111, 1010, 11111111111, 1100, 1111111111111, 1110, 1111, 1111111111111111, 11111111111111111, 10010, 1111111111111111111, 10100, 10101, 10110, 11111111111111111111111, 11000]