A152351 - OEIS

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A152351 as a simple table

n	a(n)
1	1
2	2
3	6
4	24
5	120
6	720
7	4608
8	33552
9	268560
10	2422112
11	23438552
12	249020004
13	2851308552
14	34918206024
15	462267440708
16	6449764752114

[1,2,6,24,120,720,4608,33552,268560,2422112, 23438552,249020004,2851308552,34918206024, 462267440708,6449764752114]