A288953 - cp's OEIS frontend

A288953 Number of relaxed compacted binary trees of right height at most one with minimal sequences between branch nodes except after the last branch node on level 0.

n	a(n)
0	1
1	1
2	3
3	10
4	51
5	280
6	1995
7	15120
8	138075
9	1330560
10	14812875
11	172972800
12	2271359475
13	31135104000
14	471038042475
15	7410154752000
16	126906349444875
17	2252687044608000
18	43078308695296875
19	851515702861824000
20	17984171447178811875
21	391697223316439040000

[1, 1, 3, 10, 51, 280, 1995, 15120, 138075, 1330560, 14812875, 172972800, 2271359475, 31135104000, 471038042475, 7410154752000, 126906349444875, 2252687044608000, 43078308695296875, 851515702861824000, 17984171447178811875, 391697223316439040000]

cp's OEIS Frontend

A288953 Number of relaxed compacted binary trees of right height at most one with minimal sequences between branch nodes except after the last branch node on level 0.

Table of values

List of values