# A009493 (b-file synthesized from sequence entry)
0 0
1 2
2 0
3 -48
4 -448
5 640
6 152064
7 4331264
8 46686208
9 -2948087808
10 -254321049600
11 -10904188190720
12 -96102216892416
13 35338539139923968
14 4288100201376251904
15 288606238238197678080
16 4574915805064126791680