# A009516 (b-file synthesized from sequence entry)
0 1
1 4
2 12
3 -1472
4 -159792
5 -16362304
6 -1834702400
7 -218477736448
8 -23399883425536
9 -225490426670080
10 1498513205985651712
11 985137918553296764928
12 536781621147089121005568
13 285950922368074600238661632