# A009712 (b-file synthesized from sequence entry)
0 1
1 -1
2 -7
3 391
4 -17263
5 680239
6 1450569
7 -7957325193
8 2085950965153
9 -451440698199841
10 87302333394141977
11 -12244874410272223257
12 -1227047210877649641679
13 2438662572717698729224975