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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.

A213057 Triangle read by rows: left edge is all 1's, right edge is 1, 2, 3, 4, ...; construct an internal entry by concatenating the two entries above it.

Table of values

n a(n)
0 1
1 1
2 2
3 1
4 12
5 3
6 1
7 112
8 123
9 4
10 1
11 1112
12 112123
13 1234
14 5
15 1
16 11112
17 1112112123
18 1121231234
19 12345
20 6
21 1
22 111112
23 111121112112123
24 11121121231121231234
25 112123123412345
26 123456
27 7
28 1
29 1111112
30 111112111121112112123
31 11112111211212311121121231121231234
32 11121121231121231234112123123412345
33 112123123412345123456
34 1234567
35 8

List of values

[1, 1, 2, 1, 12, 3, 1, 112, 123, 4, 1, 1112, 112123, 1234, 5, 1, 11112, 1112112123, 1121231234, 12345, 6, 1, 111112, 111121112112123, 11121121231121231234, 112123123412345, 123456, 7, 1, 1111112, 111112111121112112123, 11112111211212311121121231121231234, 11121121231121231234112123123412345, 112123123412345123456, 1234567, 8]

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

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