A152358 - OEIS

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A152358 as a simple table

n	a(n)
1	1
2	2
3	6
4	24
5	120
6	720
7	4704
8	34200
9	282528
10	2637408
11	25834536
12	286838720
13	3470883768
14	43318119864
15	595007651008
16	8853157713964

[1,2,6,24,120,720,4704,34200,282528,2637408, 25834536,286838720,3470883768,43318119864, 595007651008,8853157713964]