# A137801 (b-file synthesized from sequence entry)
1 0
2 6
3 900
4 748440
5 1559930400
6 6928346502000
7 58160619655538400
8 845986566719614320000
9 19957466912796971445888000
10 724891264860942581350908960000
11 38873628093261330554954970801600000