A052525 - cp's OEIS frontend

A052525 Number of unlabeled rooted trees with n leaves in which the degrees of the root and all internal nodes are >= 3.

n	a(n)
0	0
1	0
2	0
3	1
4	1
5	2
6	3
7	6
8	10
9	20
10	36
11	71
12	136
13	270
14	531
15	1070
16	2147
17	4367
18	8895
19	18262
20	37588
21	77795
22	161444
23	336383
24	702732
25	1472582
26	3093151
27	6513402
28	13744384
29	29063588
30	61570853
31	130669978
32	277767990
33	591373581
34	1260855164

[0, 0, 0, 1, 1, 2, 3, 6, 10, 20, 36, 71, 136, 270, 531, 1070, 2147, 4367, 8895, 18262, 37588, 77795, 161444, 336383, 702732, 1472582, 3093151, 6513402, 13744384, 29063588, 61570853, 130669978, 277767990, 591373581, 1260855164]

cp's OEIS Frontend

A052525 Number of unlabeled rooted trees with n leaves in which the degrees of the root and all internal nodes are >= 3.

Table of values

List of values