A345135 - cp's OEIS frontend

A345135 Number of ordered rooted binary trees with n leaves and with minimal Sackin tree balance index.

n	a(n)
0	1
1	1
2	1
3	2
4	1
5	4
6	6
7	4
8	1
9	8
10	28
11	56
12	70
13	56
14	28
15	8
16	1
17	16
18	120
19	560
20	1820
21	4368
22	8008
23	11440
24	12870
25	11440
26	8008
27	4368
28	1820
29	560
30	120
31	16
32	1
33	32
34	496
35	4960
36	35960
37	201376
38	906192
39	3365856
40	10518300
41	28048800
42	64512240
43	129024480
44	225792840
45	347373600
46	471435600

[1, 1, 1, 2, 1, 4, 6, 4, 1, 8, 28, 56, 70, 56, 28, 8, 1, 16, 120, 560, 1820, 4368, 8008, 11440, 12870, 11440, 8008, 4368, 1820, 560, 120, 16, 1, 32, 496, 4960, 35960, 201376, 906192, 3365856, 10518300, 28048800, 64512240, 129024480, 225792840, 347373600, 471435600]

cp's OEIS Frontend

A345135 Number of ordered rooted binary trees with n leaves and with minimal Sackin tree balance index.

Table of values

List of values