# A012133 (b-file synthesized from sequence entry)
0 1
1 -1
2 9
3 -201
4 8369
5 -559601
6 54852729
7 -7411089401
8 1320161221089
9 -299803443573601
10 84543945702681449
11 -28984920596097196201
12 11872728882101557841809
13 -5726623333843769342341201