# A012692 (b-file synthesized from sequence entry)
0 1
1 -1
2 25
3 -1057
4 81905
5 -10280289
6 1887120585
7 -476966767617
8 158890850697185
9 -67468163508862017
10 35571148438980847225
11 -22799419589275221917281
12 17459463801481355245128145