A152356 - OEIS

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A152356 as a simple table

n	a(n)
1	1
2	2
3	6
4	24
5	120
6	720
7	4560
8	32088
9	249120
10	2081200
11	20165928
12	211483252
13	2352849404
14	28163155844
15	356335410838
16	4916796632132

[1,2,6,24,120,720,4560,32088,249120,2081200, 20165928,211483252,2352849404,28163155844, 356335410838,4916796632132]