# A012916 (b-file synthesized from sequence entry)
0 1
1 -4
2 16
3 -184
4 1152
5 -99744
6 -5133696
7 -906195840
8 -171321409536
9 -44275226644992
10 -14354506519279616
11 -5752303885373679616
12 -2787951257303019290624
13 -1607824416338974332624896