A171793 - cp's OEIS frontend

A171793 Triangle read by rows: T(n,k) is the number of ternary trees with n edges and path length k; 0<=k<=n(n-1)/2.

n	a(n)
0	1
1	1
2	0
3	3
4	0
5	0
6	3
7	9
8	0
9	0
10	0
11	1
12	18
13	9
14	27
15	0
16	0
17	0
18	0
19	0
20	9
21	45
22	57
23	54
24	27
25	81
26	0
27	0
28	0
29	0
30	0
31	0
32	0
33	36
34	87
35	270
36	81
37	297
38	171
39	162
40	81
41	243
42	0
43	0
44	0
45	0
46	0
47	0
48	0
49	0
50	0
51	84
52	261
53	567
54	756
55	936
56	585
57	972
58	729
59	891
60	513
61	486
62	243
63	729
64	0
65	0
66	0
67	0
68	0
69	0
70	0
71	0
72	0
73	0
74	0
75	126
76	774
77	1080

[1, 1, 0, 3, 0, 0, 3, 9, 0, 0, 0, 1, 18, 9, 27, 0, 0, 0, 0, 0, 9, 45, 57, 54, 27, 81, 0, 0, 0, 0, 0, 0, 0, 36, 87, 270, 81, 297, 171, 162, 81, 243, 0, 0, 0, 0, 0, 0, 0, 0, 0, 84, 261, 567, 756, 936, 585, 972, 729, 891, 513, 486, 243, 729, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 126, 774, 1080]

cp's OEIS Frontend

A171793 Triangle read by rows: T(n,k) is the number of ternary trees with n edges and path length k; 0<=k<=n(n-1)/2.

Table of values

List of values