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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.

A213973 List of imprimitive words over the alphabet {1,3}.

Table of values

n a(n)
1 11
2 33
3 111
4 333
5 1111
6 1313
7 3131
8 3333
9 11111
10 33333
11 111111
12 113113
13 131131
14 131313
15 133133
16 311311
17 313131
18 313313
19 331331
20 333333
21 1111111
22 3333333
23 11111111
24 11131113
25 11311131
26 11331133
27 13111311
28 13131313
29 13311331
30 13331333
31 31113111
32 31133113
33 31313131

List of values

[11, 33, 111, 333, 1111, 1313, 3131, 3333, 11111, 33333, 111111, 113113, 131131, 131313, 133133, 311311, 313131, 313313, 331331, 333333, 1111111, 3333333, 11111111, 11131113, 11311131, 11331133, 13111311, 13131313, 13311331, 13331333, 31113111, 31133113, 31313131]

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

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