A012434 - OEIS

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A012434 as a simple table

n	a(n)
0	2
1	-4
2	278
3	-6984
4	1148202
5	-99018060
6	28635818430
7	-5588393370000
8	2487224151815250
9	-886910985311966100
10	563430775878809461350
11	-321709990033199535312600
12	277763298278504193429092730

[2,-4,278,-6984,1148202,-99018060,28635818430, -5588393370000,2487224151815250, -886910985311966100,563430775878809461350, -321709990033199535312600, 277763298278504193429092730]