A036658 - cp's OEIS frontend

A036658 Number of n-node rooted unlabeled trees with exactly 3 edges at root and otherwise out-degree <= 2.

n	a(n)
0	0
1	0
2	0
3	0
4	1
5	1
6	3
7	6
8	14
9	29
10	68
11	147
12	337
13	757
14	1734
15	3953
16	9113
17	20988
18	48645
19	112909
20	263084
21	614201
22	1438001
23	3373253
24	7930660
25	18679005
26	44075988
27	104173194
28	246604137
29	584620470
30	1387879434
31	3299067379
32	7851736348
33	18708682855
34	44627133541
35	106563177864

[0, 0, 0, 0, 1, 1, 3, 6, 14, 29, 68, 147, 337, 757, 1734, 3953, 9113, 20988, 48645, 112909, 263084, 614201, 1438001, 3373253, 7930660, 18679005, 44075988, 104173194, 246604137, 584620470, 1387879434, 3299067379, 7851736348, 18708682855, 44627133541, 106563177864]

cp's OEIS Frontend

A036658 Number of n-node rooted unlabeled trees with exactly 3 edges at root and otherwise out-degree <= 2.

Table of values

List of values