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A009596 as a simple table

na(n)
00
12
2-8
3152
4-6848
5312992
6-17468288
71385712512
8-143250864128
917321985331712
10-2418583050119168
11396575082357512192
12-75839817371814084608
1316517549362496506929152

[0,2,-8,152,-6848,312992,-17468288,1385712512,
 -143250864128,17321985331712,-2418583050119168,
 396575082357512192,-75839817371814084608,
 16517549362496506929152]