A245142 - cp's OEIS frontend

A245142 Number of n-node unlabeled rooted trees with thickening limbs and root outdegree (branching factor) 2.

n	a(n)
3	1
4	0
5	1
6	1
7	3
8	3
9	8
10	9
11	21
12	28
13	56
14	81
15	159
16	237
17	444
18	701
19	1273
20	2060
21	3699
22	6099
23	10840
24	18180
25	32079
26	54417
27	95787
28	163868
29	287914
30	496171
31	871270
32	1509676
33	2652068
34	4615810
35	8114578
36	14176261
37	24947471
38	43718822
39	77031659
40	135350915
41	238791685
42	420544851

[1, 0, 1, 1, 3, 3, 8, 9, 21, 28, 56, 81, 159, 237, 444, 701, 1273, 2060, 3699, 6099, 10840, 18180, 32079, 54417, 95787, 163868, 287914, 496171, 871270, 1509676, 2652068, 4615810, 8114578, 14176261, 24947471, 43718822, 77031659, 135350915, 238791685, 420544851]

cp's OEIS Frontend

A245142 Number of n-node unlabeled rooted trees with thickening limbs and root outdegree (branching factor) 2.

Table of values

List of values