A050971 - OEIS

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A050971 as a simple table

n	a(n)
1	1
2	2
3	8
4	24
5	384
6	240
7	46080
8	40320
9	2064384
10	725760
11	3715891200
12	159667200
13	392398110720
14	12454041600
15	1428329123020800
16	20922789888000
17	274239191619993600
18	711374856192000
19	1678343852714360832000

[1,2,8,24,384,240,46080,40320,2064384,725760, 3715891200,159667200,392398110720,12454041600, 1428329123020800,20922789888000, 274239191619993600,711374856192000, 1678343852714360832000]