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.

A237454 Minimal representation (considered minimal in any canonical base b > 3) of n in a binary system with two distinct digits "1" and "3", not allowing zeros, where a digit d in position p (p = 1,2,3,...,n) represents the value d^p.

Table of values

n a(n)
1 1
2 11
3 3
4 13
5 113
6 1113
7 11113
8 111113
9 1111113
10 31
11 131
12 33
13 133
14 1133
15 11133
16 111133
17 1111133
18 11111133
19 111111133
20 1111111133
21 11111111133
22 111111111133
23 1111111111133
24 11111111111133
25 111111111111133
26 1111111111111133
27 11111111111111133
28 111111111111111133
29 311
30 1311
31 313
32 1313
33 11313
34 111313
35 1111313
36 11111313
37 331
38 1331
39 333
40 1333
41 11333

List of values

[1, 11, 3, 13, 113, 1113, 11113, 111113, 1111113, 31, 131, 33, 133, 1133, 11133, 111133, 1111133, 11111133, 111111133, 1111111133, 11111111133, 111111111133, 1111111111133, 11111111111133, 111111111111133, 1111111111111133, 11111111111111133, 111111111111111133, 311, 1311, 313, 1313, 11313, 111313, 1111313, 11111313, 331, 1331, 333, 1333, 11333]