# A337678 (b-file synthesized from sequence entry)
0 1
1 -1
2 31
3 -7322
4 7281664
5 -22105862624
6 166969429228448
7 -2726003940127256256
8 86768429205346333655040
9 -4977000682976771751013908480
10 483455102073887625685155978412032
11 -75632981854199587114694850276377296896
12 18281294958403743105166278735321854559387648