A102004 - cp's OEIS frontend

A102004 Triangle read by rows: T(n,k) is the number of ordered trees with n edges and having k branches of even length (n>=0, 0<=k<=floor(n/2)).

n	a(n)
0	1
1	1
2	1
3	1
4	3
5	2
6	6
7	7
8	1
9	16
10	20
11	6
12	40
13	64
14	26
15	2
16	109
17	196
18	108
19	16
20	297
21	619
22	414
23	96
24	4
25	836
26	1940
27	1557
28	484
29	45
30	2377
31	6142
32	5690
33	2247
34	331
35	9
36	6869
37	19454
38	20535
39	9792
40	2010
41	126
42	20042
43	61893
44	73123
45	40997
46	10820
47	1116
48	21
49	59071
50	197280
51	258220

[1, 1, 1, 1, 3, 2, 6, 7, 1, 16, 20, 6, 40, 64, 26, 2, 109, 196, 108, 16, 297, 619, 414, 96, 4, 836, 1940, 1557, 484, 45, 2377, 6142, 5690, 2247, 331, 9, 6869, 19454, 20535, 9792, 2010, 126, 20042, 61893, 73123, 40997, 10820, 1116, 21, 59071, 197280, 258220]

cp's OEIS Frontend

A102004 Triangle read by rows: T(n,k) is the number of ordered trees with n edges and having k branches of even length (n>=0, 0<=k<=floor(n/2)).

Table of values

List of values