A231602 - cp's OEIS frontend

A231602 Triangular array read by rows: T(n,k) is the number of rooted labeled trees on n nodes that have exactly k nodes with outdegree = 1, n>=1, 0<=k<=n-1.

n	a(n)
1	1
2	0
3	2
4	3
5	0
6	6
7	4
8	36
9	0
10	24
11	65
12	80
13	360
14	0
15	120
16	306
17	1950
18	1200
19	3600
20	0
21	720
22	4207
23	12852
24	40950
25	16800
26	37800
27	0
28	5040
29	38424
30	235592
31	359856
32	764400
33	235200
34	423360
35	0
36	40320
37	573057
38	2766528
39	8481312
40	8636544
41	13759200
42	3386880
43	5080320
44	0
45	362880

[1, 0, 2, 3, 0, 6, 4, 36, 0, 24, 65, 80, 360, 0, 120, 306, 1950, 1200, 3600, 0, 720, 4207, 12852, 40950, 16800, 37800, 0, 5040, 38424, 235592, 359856, 764400, 235200, 423360, 0, 40320, 573057, 2766528, 8481312, 8636544, 13759200, 3386880, 5080320, 0, 362880]

cp's OEIS Frontend

A231602 Triangular array read by rows: T(n,k) is the number of rooted labeled trees on n nodes that have exactly k nodes with outdegree = 1, n>=1, 0<=k<=n-1.

Table of values

List of values