# A012054 (b-file synthesized from sequence entry)
0 1
1 -1
2 9
3 -225
4 3345
5 -893025
6 -36212775
7 -20892252225
8 -3614048241375
9 -1664630362370625
10 -584598534985164375
11 -327627617091486830625
12 -181787523574523506599375
13 -131875411531849225343390625