A052594 - OEIS

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A052594 as a simple table

n	a(n)
0	0
1	1
2	6
3	24
4	192
5	1920
6	23040
7	322560
8	5160960
9	92897280
10	1857945600
11	40874803200
12	980995276800
13	25505877196800
14	714164561510400
15	21424936845312000
16	685597979049984000
17	23310331287699456000

[0,1,6,24,192,1920,23040,322560,5160960,92897280, 1857945600,40874803200,980995276800, 25505877196800,714164561510400,21424936845312000, 685597979049984000,23310331287699456000]