A367767 - OEIS

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A367767 as a simple table

n	a(n)
1	1
2	2
3	6
4	6
5	20
6	1200
7	3024000
8	63504000
9	5334336000
10	4779565056000
11	9635603152896000
12	404695332421632000
13	44071321700715724800000
14	7329942225263039348736000000

[1,2,6,6,20,1200,3024000,63504000,5334336000, 4779565056000,9635603152896000,404695332421632000, 44071321700715724800000, 7329942225263039348736000000]