A185422 - cp's OEIS frontend

A185422 Forests of k increasing plane unary-binary trees on n nodes. Generalized Stirling numbers of the second kind associated with A185415.

n	a(n)
1	1
2	1
3	1
4	3
5	3
6	1
7	9
8	15
9	6
10	1
11	39
12	75
13	45
14	10
15	1
16	189
17	459
18	330
19	105
20	15
21	1
22	1107
23	3087
24	2709
25	1050
26	210
27	21
28	1
29	7281
30	23535
31	23814
32	11109
33	2730
34	378
35	28
36	1
37	54351
38	197235
39	228285
40	122850
41	36099
42	6174
43	630
44	36
45	1

[1, 1, 1, 3, 3, 1, 9, 15, 6, 1, 39, 75, 45, 10, 1, 189, 459, 330, 105, 15, 1, 1107, 3087, 2709, 1050, 210, 21, 1, 7281, 23535, 23814, 11109, 2730, 378, 28, 1, 54351, 197235, 228285, 122850, 36099, 6174, 630, 36, 1]

cp's OEIS Frontend

A185422 Forests of k increasing plane unary-binary trees on n nodes. Generalized Stirling numbers of the second kind associated with A185415.

Table of values

List of values