A162447 - OEIS

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A162447 as a simple table

n	a(n)
2	12
3	720
4	181440
5	7257600
6	399168000
7	1307674368000
8	73229764608000
9	731699852083200
10	229909239772692480000
11	84300054583320576000000
12	51186993142992253747200000
13	21777738900836704321536000000

[12,720,181440,7257600,399168000,1307674368000, 73229764608000,731699852083200, 229909239772692480000,84300054583320576000000, 51186993142992253747200000, 21777738900836704321536000000]