# A111237 (b-file synthesized from sequence entry)
1 1
2 12
3 2880
4 226800
5 101606400
6 6985440000
7 35961045120000
8 1431699108840000
9 692306057963520000
10 181128033944995737600
11 344143264495491901440000
12 6651046563131624734080000
13 22028266217091941119272960000