# A013151 (b-file synthesized from sequence entry)
0 1
1 -4
2 112
3 -7744
4 995840
5 -205558144
6 62203595776
7 -25948859891712
8 14273513699311616
9 -10010170584339742720
10 8717845696617764192256
11 -9230668213290446763196416
12 11677592409577212192402440192