A120983 - cp's OEIS frontend

A120983 Triangle read by rows: T(n,k) is the number of ternary trees with n edges and having k vertices of outdegree 3 (n >= 0, k >= 0).

n	a(n)
0	1
1	3
2	12
3	54
4	1
5	261
6	12
7	1323
8	105
9	6939
10	810
11	3
12	37341
13	5859
14	63
15	205011
16	40824
17	840
18	1143801
19	277830
20	9072
21	12
22	6466230
23	1861380
24	86670
25	360
26	36960300
27	12335895
28	764478
29	6435
30	213243435
31	81120204
32	6377778
33	89100
34	55
35	1240219269
36	530408736

[1, 3, 12, 54, 1, 261, 12, 1323, 105, 6939, 810, 3, 37341, 5859, 63, 205011, 40824, 840, 1143801, 277830, 9072, 12, 6466230, 1861380, 86670, 360, 36960300, 12335895, 764478, 6435, 213243435, 81120204, 6377778, 89100, 55, 1240219269, 530408736]

cp's OEIS Frontend

A120983 Triangle read by rows: T(n,k) is the number of ternary trees with n edges and having k vertices of outdegree 3 (n >= 0, k >= 0).

Table of values

List of values