A009823 - OEIS

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A009823 as a simple table

n	a(n)
0	1
1	-64
2	6016
3	182844416
4	-1001405579264
5	-33574129505665024
6	1883390165749948481536
7	20340448295605095121289216
8	-36112647755760335076622057078784

[1,-64,6016,182844416,-1001405579264, -33574129505665024,1883390165749948481536, 20340448295605095121289216, -36112647755760335076622057078784]