# A009674 (b-file synthesized from sequence entry)
0 1
1 -2
2 -28
3 1160
4 -3504
5 -3908896
6 360691008
7 14544047232
8 -11198480094976
9 1531305962216960
10 340347851378082816
11 -234547726326061201408
12 32383387692585279868928
13 30186184832886791121723392