# A012233 (b-file synthesized from sequence entry)
0 1
1 -2
2 32
3 -944
4 64640
5 -5881600
6 919673856
7 -172830523392
8 48225099218944
9 -15466881283850240
10 6745794347282989056
11 -3302151520495305490432
12 2072514460288282576027648
13 -1438958551527596730993344512