A160489 - OEIS

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A160489 as a simple table

n	a(n)
2	1
3	-97
4	52558
5	-5240581
6	4720558732
7	-7481314964114
8	1271274660247796
9	-9765829515601025979
10	161400398363673797534104
11	-292099194247292179451930316
12	2969226837548487086516550438360

[1,-97,52558,-5240581,4720558732,-7481314964114, 1271274660247796,-9765829515601025979, 161400398363673797534104, -292099194247292179451930316, 2969226837548487086516550438360]