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.

A071153 Ɓukasiewicz word for each rooted plane tree (interpretation e in Stanley's exercise 19) encoded by A014486 (or A063171), with the last leaf implicit, i.e., these words are given without the last trailing zero, except for the null tree which is encoded as 0.

Table of values

n a(n)
0 0
1 1
2 20
3 11
4 300
5 201
6 210
7 120
8 111
9 4000
10 3001
11 3010
12 2020
13 2011
14 3100
15 2101
16 2200
17 1300
18 1201
19 2110
20 1210
21 1120
22 1111
23 50000
24 40001
25 40010
26 30020
27 30011
28 40100
29 30101
30 30200
31 20300
32 20201
33 30110
34 20210
35 20120
36 20111
37 41000
38 31001
39 31010

List of values

[0, 1, 20, 11, 300, 201, 210, 120, 111, 4000, 3001, 3010, 2020, 2011, 3100, 2101, 2200, 1300, 1201, 2110, 1210, 1120, 1111, 50000, 40001, 40010, 30020, 30011, 40100, 30101, 30200, 20300, 20201, 30110, 20210, 20120, 20111, 41000, 31001, 31010]