A363272 - cp's OEIS frontend

A363272 Irregular triangle read by rows: T(n,k) = number of unlabeled binary rooted trees with n leaves, where some child tree has k leaves, 1 <= k <= n/2.

n	a(n)
2	1
3	1
4	1
5	1
6	2
7	1
8	3
9	2
10	1
11	6
12	3
13	2
14	11
15	6
16	3
17	3
18	23
19	11
20	6
21	6
22	46
23	23
24	11
25	12
26	6
27	98
28	46
29	23
30	22
31	18
32	207
33	98
34	46
35	46
36	33
37	21
38	451
39	207
40	98
41	92
42	69
43	66
44	983
45	451
46	207
47	196
48	138
49	138
50	66
51	2179
52	983
53	451
54	414
55	294
56	276
57	253
58	4850
59	2179
60	983
61	902
62	621
63	588
64	506
65	276

[1, 1, 1, 1, 2, 1, 3, 2, 1, 6, 3, 2, 11, 6, 3, 3, 23, 11, 6, 6, 46, 23, 11, 12, 6, 98, 46, 23, 22, 18, 207, 98, 46, 46, 33, 21, 451, 207, 98, 92, 69, 66, 983, 451, 207, 196, 138, 138, 66, 2179, 983, 451, 414, 294, 276, 253, 4850, 2179, 983, 902, 621, 588, 506, 276]

cp's OEIS Frontend

A363272 Irregular triangle read by rows: T(n,k) = number of unlabeled binary rooted trees with n leaves, where some child tree has k leaves, 1 <= k <= n/2.

Table of values

List of values