A120982 - cp's OEIS frontend

A120982 Triangle read by rows: T(n,k) is the number of ternary trees with n edges and having k vertices of outdegree 2 (n >= 0, k >= 0).

n	a(n)
0	1
1	3
2	9
3	3
4	28
5	27
6	93
7	162
8	18
9	333
10	825
11	270
12	1272
13	3915
14	2430
15	135
16	5085
17	18144
18	17199
19	2835
20	20925
21	84000
22	106596
23	34020
24	1134
25	87735
26	391554
27	612360
28	308448
29	30618
30	372879
31	1838295
32	3369600
33	2364390
34	459270
35	10206
36	1602450
37	8674380

[1, 3, 9, 3, 28, 27, 93, 162, 18, 333, 825, 270, 1272, 3915, 2430, 135, 5085, 18144, 17199, 2835, 20925, 84000, 106596, 34020, 1134, 87735, 391554, 612360, 308448, 30618, 372879, 1838295, 3369600, 2364390, 459270, 10206, 1602450, 8674380]

cp's OEIS Frontend

A120982 Triangle read by rows: T(n,k) is the number of ternary trees with n edges and having k vertices of outdegree 2 (n >= 0, k >= 0).

Table of values

List of values