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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.

A037582 Decimal expansion of a(n) is given by the first n terms of the periodic sequence with initial period 1,3.

Table of values

n a(n)
1 1
2 13
3 131
4 1313
5 13131
6 131313
7 1313131
8 13131313
9 131313131
10 1313131313
11 13131313131
12 131313131313
13 1313131313131
14 13131313131313
15 131313131313131
16 1313131313131313
17 13131313131313131
18 131313131313131313
19 1313131313131313131
20 13131313131313131313

List of values

[1, 13, 131, 1313, 13131, 131313, 1313131, 13131313, 131313131, 1313131313, 13131313131, 131313131313, 1313131313131, 13131313131313, 131313131313131, 1313131313131313, 13131313131313131, 131313131313131313, 1313131313131313131, 13131313131313131313]

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