# A012680 (b-file synthesized from sequence entry)
0 0
1 2
2 -16
3 80
4 14464
5 -1682432
6 76011520
7 26175092736
8 -10889734127616
9 1790915255599104
10 628448342217064448
11 -708415309969044275200
12 277815404352915818676224
13 89144743290434384702734336