A203418 - OEIS

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A203418 as a simple table

n	a(n)
1	1
2	2
3	16
4	240
5	11520
6	13271040
7	254803968000
8	15892123484160000
9	5126163351050649600000
10	89288743527804466888704000000
11	50689719717698351557731837542400000000
12	125765178831579421305165126665125232640000000000

[1,2,16,240,11520,13271040,254803968000, 15892123484160000,5126163351050649600000, 89288743527804466888704000000, 50689719717698351557731837542400000000, 125765178831579421305165126665125232640000000000]