A352766 - OEIS

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A352766 as a simple table

n	a(n)
1	1
2	1
3	3
4	10
5	64
6	1088
7	33792
8	4194304
9	536870912
10	137975824384
11	70506183131136
12	72127962782105600
13	147646010183714340864

[1,1,3,10,64,1088,33792,4194304,536870912, 137975824384,70506183131136,72127962782105600, 147646010183714340864]