# A012097 (b-file synthesized from sequence entry)
0 1
1 1
2 1
3 49
4 -447
5 78561
6 -5655231
7 1014069393
8 -187639949439
9 51144433721793
10 -16631972691697791
11 6837287119716744945
12 -3357388632038371909695
13 1969419543279480607781025