A299037 - cp's OEIS frontend

A299037 a(n) is the number of rooted binary trees with minimal Sackin index and n leaves.

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	2
7	1
8	1
9	1
10	3
11	3
12	5
13	3
14	3
15	1
16	1
17	1
18	4
19	6
20	14
21	17
22	27
23	28
24	35
25	28
26	27
27	17
28	14
29	6
30	4
31	1
32	1
33	1
34	5
35	10
36	30
37	55
38	121
39	207
40	378
41	575
42	894
43	1217
44	1651
45	1993
46	2373
47	2546
48	2682
49	2546
50	2373
51	1993
52	1651
53	1217
54	894
55	575
56	378
57	207
58	121
59	55
60	30
61	10
62	5
63	1
64	1
65	1
66	6
67	15
68	55
69	135
70	381
71	903
72	2205
73	4848
74	10599
75	21631

[1, 1, 1, 1, 1, 2, 1, 1, 1, 3, 3, 5, 3, 3, 1, 1, 1, 4, 6, 14, 17, 27, 28, 35, 28, 27, 17, 14, 6, 4, 1, 1, 1, 5, 10, 30, 55, 121, 207, 378, 575, 894, 1217, 1651, 1993, 2373, 2546, 2682, 2546, 2373, 1993, 1651, 1217, 894, 575, 378, 207, 121, 55, 30, 10, 5, 1, 1, 1, 6, 15, 55, 135, 381, 903, 2205, 4848, 10599, 21631]

cp's OEIS Frontend

A299037 a(n) is the number of rooted binary trees with minimal Sackin index and n leaves.

Table of values

List of values