# A012230 (b-file synthesized from sequence entry)
0 1
1 -1
2 21
3 -1101
4 109001
5 -17491001
6 4139085981
7 -1355308485701
8 586612833746961
9 -324261948714025201
10 222851423174495787941
11 -186365710421614910029501
12 186332939048243649892744921