A205824 - OEIS

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A205824 as a simple table

n	a(n)
1	1
2	10
3	280
4	13860
5	1009008
6	98017920
7	11972188800
8	1766895530400
9	306261891936000
10	61040779261862400
11	13761921142674432000
12	3464298995338621440000
13	963455812901426718720000
14	293441113300834537758720000

[1,10,280,13860,1009008,98017920,11972188800, 1766895530400,306261891936000,61040779261862400, 13761921142674432000,3464298995338621440000, 963455812901426718720000, 293441113300834537758720000]