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.

A334131 Numbers that can be written as a product of distinct repunits.

Table of values

n a(n)
1 0
2 1
3 11
4 111
5 1111
6 1221
7 11111
8 12221
9 111111
10 122221
11 123321
12 1111111
13 1222221
14 1233321
15 1356531
16 11111111
17 12222221
18 12333321
19 12344321
20 13566531
21 111111111
22 122222221
23 123333321
24 123444321
25 135666531
26 135787531
27 1111111111
28 1222222221

List of values

[0, 1, 11, 111, 1111, 1221, 11111, 12221, 111111, 122221, 123321, 1111111, 1222221, 1233321, 1356531, 11111111, 12222221, 12333321, 12344321, 13566531, 111111111, 122222221, 123333321, 123444321, 135666531, 135787531, 1111111111, 1222222221]

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

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