A209644 - cp's OEIS frontend

A209644 Łukasiewicz words (without the last zero) for rooted plane trees where non-leaf branching can occur only at the leftmost branch of any level, but nowhere else.

n	a(n)
0	0
1	1
2	20
3	11
4	300
5	210
6	120
7	111
8	4000
9	3100
10	2200
11	1300
12	2110
13	1210
14	1120
15	1111
16	50000
17	41000
18	32000
19	23000
20	14000
21	31100
22	22100
23	13100
24	21200
25	12200
26	11300
27	21110
28	12110
29	11210
30	11120
31	11111
32	600000
33	510000
34	420000
35	330000
36	240000
37	150000
38	411000
39	321000
40	231000
41	141000
42	312000
43	222000
44	132000
45	213000

[0, 1, 20, 11, 300, 210, 120, 111, 4000, 3100, 2200, 1300, 2110, 1210, 1120, 1111, 50000, 41000, 32000, 23000, 14000, 31100, 22100, 13100, 21200, 12200, 11300, 21110, 12110, 11210, 11120, 11111, 600000, 510000, 420000, 330000, 240000, 150000, 411000, 321000, 231000, 141000, 312000, 222000, 132000, 213000]

cp's OEIS Frontend

A209644 Łukasiewicz words (without the last zero) for rooted plane trees where non-leaf branching can occur only at the leftmost branch of any level, but nowhere else.

Table of values

List of values