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.

A087511 Primes consisting only of digits 1 and 3 occurring with equal frequency.

Table of values

n a(n)
1 13
2 31
3 11313331
4 11333131
5 13111333
6 13131133
7 13131331
8 13133311
9 13311313
10 31133131
11 33113131
12 1113131333
13 1131131333
14 1131311333
15 1131331133
16 1133111333
17 1133113133
18 1133133311
19 1133311313
20 1133313113
21 1133313131
22 1133331113
23 1311113333
24 1311311333
25 1311313313

List of values

[13, 31, 11313331, 11333131, 13111333, 13131133, 13131331, 13133311, 13311313, 31133131, 33113131, 1113131333, 1131131333, 1131311333, 1131331133, 1133111333, 1133113133, 1133133311, 1133311313, 1133313113, 1133313131, 1133331113, 1311113333, 1311311333, 1311313313]

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

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