A244457 - cp's OEIS frontend

A244457 Number of unlabeled rooted trees with n nodes such that the minimal outdegree of inner nodes equals 3.

n	a(n)
4	1
5	0
6	0
7	1
8	2
9	2
10	4
11	7
12	12
13	20
14	34
15	56
16	98
17	167
18	284
19	484
20	835
21	1433
22	2467
23	4250
24	7345
25	12700
26	22004
27	38154
28	66266
29	115224
30	200623
31	349654
32	610126
33	1065739
34	1863547
35	3261672
36	5714277
37	10020092
38	17586014
39	30890654
40	54305289
41	95542387
42	168221056
43	296401979

[1, 0, 0, 1, 2, 2, 4, 7, 12, 20, 34, 56, 98, 167, 284, 484, 835, 1433, 2467, 4250, 7345, 12700, 22004, 38154, 66266, 115224, 200623, 349654, 610126, 1065739, 1863547, 3261672, 5714277, 10020092, 17586014, 30890654, 54305289, 95542387, 168221056, 296401979]

cp's OEIS Frontend

A244457 Number of unlabeled rooted trees with n nodes such that the minimal outdegree of inner nodes equals 3.

Table of values

List of values