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A012298
as a simple table
n
a(n)
0
0
1
2
2
-8
3
152
4
-6848
5
312992
6
-17468288
7
1385712512
8
-143250864128
9
17321985331712
[0,2,-8,152,-6848,312992,-17468288,1385712512, -143250864128,17321985331712]