A152636 - OEIS

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A152636 as a simple table

n	a(n)
1	1
2	2
3	6
4	24
5	120
6	720
7	5040
8	40320
9	341760
10	3212640
11	32435424
12	359770272
13	4362965120
14	55955291968
15	778123945616
16	11693170893860

[1,2,6,24,120,720,5040,40320,341760,3212640, 32435424,359770272,4362965120,55955291968, 778123945616,11693170893860]