# A012164 (b-file synthesized from sequence entry)
0 1
1 2
2 16
3 216
4 6400
5 125696
6 18156672
7 -930421504
8 394852151296
9 -97538559528960
10 37824762737852416
11 -16526000392804139008
12 8864261701679059992576
13 -5567468507542446595047424