A152644 - OEIS

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A152644 as a simple table

n	a(n)
1	1
2	2
3	6
4	24
5	120
6	720
7	5040
8	40320
9	343680
10	3210336
11	32428512
12	359501856
13	4409024192
14	56394389456
15	777561149096
16	11557514999280

[1,2,6,24,120,720,5040,40320,343680,3210336, 32428512,359501856,4409024192,56394389456, 777561149096,11557514999280]