A105492 - OEIS

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A105492 as a simple table

n	a(n)
6	1
7	6
8	36
9	210
10	1260
11	7833
12	50701
13	342126
14	2406645
15	17633820
16	134427468
17	1064801442
18	8751834839
19	74540800014

[1,6,36,210,1260,7833,50701,342126,2406645, 17633820,134427468,1064801442,8751834839, 74540800014]