A126183 - cp's OEIS frontend

A126183 Triangle read by rows: T(n,k) is number of hex trees with n edges and k nonroot nodes of outdegree 2.

n	a(n)
0	1
1	3
2	10
3	33
4	3
5	108
6	29
7	351
8	186
9	6
10	1134
11	990
12	95
13	3645
14	4725
15	900
16	15
17	11664
18	20979
19	6615
20	329
21	37179
22	88452
23	41580
24	4116
25	42
26	118098
27	358668
28	234738
29	38556
30	1176
31	373977
32	1410615
33	1224720
34	300510
35	18270
36	126
37	1180980
38	5412825
39	6014250

[1, 3, 10, 33, 3, 108, 29, 351, 186, 6, 1134, 990, 95, 3645, 4725, 900, 15, 11664, 20979, 6615, 329, 37179, 88452, 41580, 4116, 42, 118098, 358668, 234738, 38556, 1176, 373977, 1410615, 1224720, 300510, 18270, 126, 1180980, 5412825, 6014250]

cp's OEIS Frontend

A126183 Triangle read by rows: T(n,k) is number of hex trees with n edges and k nonroot nodes of outdegree 2.

Table of values

List of values