# A067551 (b-file synthesized from sequence entry)
1 2
2 -7
3 -32
4 240
5 2528
6 -34112
7 -563712
8 10987520
9 247459840
10 -7297638400
11 -222713856000
12 8349585408000
13 338297978880000
14 -14712528568320000
15 -684369944248320000
16 36606670004551680000
17 2142049437446307840000
18 -131713035645097082880000