# A024249 (b-file synthesized from sequence entry)
0 0
1 1
2 4
3 24
4 192
5 9472
6 1182208
7 135668736
8 14993473536
9 1702145425408
10 212302947942400
11 32402586267549696
12 6715751146400514048
13 1845064263947813650432
14 597912413872386432040960