# A163092 (b-file synthesized from sequence entry)
0 1
1 16
2 240
3 3600
4 53880
5 806400
6 12069120
7 180633600
8 2703470280
9 40461750000
10 605574696720
11 9063392310000
12 135648138214680
13 2030190989349600
14 30385049935084320
15 454760790684530400
16 6806221388012959080
17 101865971146974325200
18 1524586916316221551920