A152628 - OEIS

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A152628 as a simple table

n	a(n)
1	1
2	2
3	6
4	24
5	120
6	720
7	5040
8	40320
9	330240
10	2926656
11	27806976
12	287160384
13	3186150912
14	38895891136
15	493003257904
16	6782866786416

[1,2,6,24,120,720,5040,40320,330240,2926656, 27806976,287160384,3186150912,38895891136, 493003257904,6782866786416]