A230611 - OEIS

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A230611 as a simple table

n	a(n)
1	0
2	8
3	260
4	7072
5	186396
6	4899200
7	128706852
8	3381000336
9	88814433756
10	2333033998864
11	61285601758916
12	1609888586400576
13	42289561773667932
14	1110888696290586976
15	29181520062175286564
16	766558446366309855152

[0,8,260,7072,186396,4899200,128706852,3381000336, 88814433756,2333033998864,61285601758916, 1609888586400576,42289561773667932, 1110888696290586976,29181520062175286564, 766558446366309855152]