A052707 - OEIS

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A052707 as a simple table

n	a(n)
0	0
1	2
2	8
3	64
4	640
5	7168
6	86016
7	1081344
8	14057472
9	187432960
10	2549088256
11	35223764992
12	493132709888
13	6979724509184
14	99710350131200
15	1435829041889280
16	20819521107394560
17	303720072625520640
18	4454561065174302720

[0,2,8,64,640,7168,86016,1081344,14057472, 187432960,2549088256,35223764992,493132709888, 6979724509184,99710350131200,1435829041889280, 20819521107394560,303720072625520640, 4454561065174302720]