# A181485 (b-file synthesized from sequence entry)
1 1
2 4
3 112
4 144
5 23400
6 28224
7 247104
8 604800
9 26812800
10 2677752000
11 6805814400
12 165145780800
13 1248124550400
14 17996854730400
15 388778796252000