A012696 - OEIS

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A012696 as a simple table

n	a(n)
0	2
1	-16
2	32
3	18944
4	-1904128
5	41160704
6	41418432512
7	-13226611572736
8	1026478445821952
9	1419327244545818624
10	-990157599155377143808
11	185269154824838954614784
12	314145305969818487050207232

[2,-16,32,18944,-1904128,41160704,41418432512, -13226611572736,1026478445821952, 1419327244545818624,-990157599155377143808, 185269154824838954614784, 314145305969818487050207232]