A255517 - cp's OEIS frontend

A255517 Number A(n,k) of rooted identity trees with n nodes and k-colored non-root nodes; square array A(n,k), n>=0, k>=0, read by antidiagonals.

n	a(n)
0	0
1	0
2	1
3	0
4	1
5	0
6	0
7	1
8	1
9	0
10	0
11	1
12	2
13	1
14	0
15	0
16	1
17	3
18	5
19	2
20	0
21	0
22	1
23	4
24	12
25	18
26	3
27	0
28	0
29	1
30	5
31	22
32	64
33	66
34	6
35	0
36	0
37	1
38	6
39	35
40	156
41	363
42	266
43	12
44	0
45	0
46	1
47	7
48	51
49	310
50	1193
51	2214
52	1111
53	25
54	0
55	0
56	1
57	8
58	70
59	542
60	2980
61	9748
62	14043
63	4792
64	52
65	0
66	0
67	1
68	9
69	92
70	868
71	6273
72	30526
73	82916
74	91857
75	21124
76	113
77	0

[0, 0, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 2, 1, 0, 0, 1, 3, 5, 2, 0, 0, 1, 4, 12, 18, 3, 0, 0, 1, 5, 22, 64, 66, 6, 0, 0, 1, 6, 35, 156, 363, 266, 12, 0, 0, 1, 7, 51, 310, 1193, 2214, 1111, 25, 0, 0, 1, 8, 70, 542, 2980, 9748, 14043, 4792, 52, 0, 0, 1, 9, 92, 868, 6273, 30526, 82916, 91857, 21124, 113, 0]

cp's OEIS Frontend

A255517 Number A(n,k) of rooted identity trees with n nodes and k-colored non-root nodes; square array A(n,k), n>=0, k>=0, read by antidiagonals.

Table of values

List of values