A126178 - cp's OEIS frontend

A126178 Triangle read by rows: T(n,k) is number of hex trees with n edges and k vertices of outdegree 1 (0<=k<=n).

n	a(n)
0	1
1	0
2	3
3	1
4	0
5	9
6	0
7	9
8	0
9	27
10	2
11	0
12	54
13	0
14	81
15	0
16	30
17	0
18	270
19	0
20	243
21	5
22	0
23	270
24	0
25	1215
26	0
27	729
28	0
29	105
30	0
31	1890
32	0
33	5103
34	0
35	2187
36	14
37	0
38	1260
39	0
40	11340
41	0
42	20412
43	0
44	6561
45	0
46	378
47	0
48	11340
49	0
50	61236
51	0
52	78732
53	0
54	19683
55	42
56	0
57	5670
58	0
59	85050
60	0
61	306180
62	0
63	295245
64	0

[1, 0, 3, 1, 0, 9, 0, 9, 0, 27, 2, 0, 54, 0, 81, 0, 30, 0, 270, 0, 243, 5, 0, 270, 0, 1215, 0, 729, 0, 105, 0, 1890, 0, 5103, 0, 2187, 14, 0, 1260, 0, 11340, 0, 20412, 0, 6561, 0, 378, 0, 11340, 0, 61236, 0, 78732, 0, 19683, 42, 0, 5670, 0, 85050, 0, 306180, 0, 295245, 0]

cp's OEIS Frontend

A126178 Triangle read by rows: T(n,k) is number of hex trees with n edges and k vertices of outdegree 1 (0<=k<=n).

Table of values

List of values