A304173 - cp's OEIS frontend

A304173 Number of rooted plane trees where every branch that has a predecessor (a branch directly to its left and emanating from the same root) has at least as many leaves as its predecessor.

n	a(n)
1	1
2	1
3	2
4	5
5	13
6	34
7	90
8	242
9	660
10	1822
11	5085
12	14333
13	40759
14	116817
15	337140
16	979098
17	2859439
18	8393113
19	24747052
20	73262246
21	217681621
22	648939319
23	1940461444
24	5818595438
25	17492367097
26	52712114792
27	159193762250
28	481754196170
29	1460650624068
30	4436422703787
31	13496947320929

[1, 1, 2, 5, 13, 34, 90, 242, 660, 1822, 5085, 14333, 40759, 116817, 337140, 979098, 2859439, 8393113, 24747052, 73262246, 217681621, 648939319, 1940461444, 5818595438, 17492367097, 52712114792, 159193762250, 481754196170, 1460650624068, 4436422703787, 13496947320929]

cp's OEIS Frontend

A304173 Number of rooted plane trees where every branch that has a predecessor (a branch directly to its left and emanating from the same root) has at least as many leaves as its predecessor.

Table of values

List of values