A159772 - cp's OEIS frontend

A159772 Number of n-leaf binary trees that do not contain (()((((()())())())())) as a subtree.

n	a(n)
1	1
2	1
3	2
4	5
5	14
6	41
7	124
8	384
9	1210
10	3865
11	12482
12	40677
13	133572
14	441468
15	1467296
16	4900760
17	16439370
18	55357305
19	187050302
20	633998079
21	2154950454
22	7343407521
23	25082709012
24	85858848820
25	294480653064
26	1011871145116
27	3482837144984
28	12006861566684
29	41454180382688

[1, 1, 2, 5, 14, 41, 124, 384, 1210, 3865, 12482, 40677, 133572, 441468, 1467296, 4900760, 16439370, 55357305, 187050302, 633998079, 2154950454, 7343407521, 25082709012, 85858848820, 294480653064, 1011871145116, 3482837144984, 12006861566684, 41454180382688]

cp's OEIS Frontend

A159772 Number of n-leaf binary trees that do not contain (()((((()())())())())) as a subtree.

Table of values

List of values