A127158 - cp's OEIS frontend

A127158 Triangle read by rows: T(n,k) is the number of ordered trees with n edges and having k branches of length 1 starting from the root (0<=k<=n).

n	a(n)
0	1
1	0
2	1
3	1
4	0
5	1
6	1
7	3
8	0
9	1
10	3
11	5
12	5
13	0
14	1
15	7
16	18
17	9
18	7
19	0
20	1
21	20
22	52
23	37
24	13
25	9
26	0
27	1
28	59
29	168
30	113
31	60
32	17
33	11
34	0
35	1
36	184
37	546
38	388
39	190
40	87
41	21
42	13
43	0
44	1
45	593
46	1826
47	1313
48	688
49	283
50	118
51	25
52	15
53	0
54	1
55	1964
56	6211
57	4545
58	2408
59	1076
60	392
61	153
62	29
63	17
64	0
65	1
66	6642
67	21459

[1, 0, 1, 1, 0, 1, 1, 3, 0, 1, 3, 5, 5, 0, 1, 7, 18, 9, 7, 0, 1, 20, 52, 37, 13, 9, 0, 1, 59, 168, 113, 60, 17, 11, 0, 1, 184, 546, 388, 190, 87, 21, 13, 0, 1, 593, 1826, 1313, 688, 283, 118, 25, 15, 0, 1, 1964, 6211, 4545, 2408, 1076, 392, 153, 29, 17, 0, 1, 6642, 21459]

cp's OEIS Frontend

A127158 Triangle read by rows: T(n,k) is the number of ordered trees with n edges and having k branches of length 1 starting from the root (0<=k<=n).

Table of values

List of values