# A134356 (b-file synthesized from sequence entry)
1 1
2 4
3 42
4 1008
5 51480
6 5353920
7 1100473920
8 437480709120
9 330886851724800
10 470053968773760000
11 1241242628123282400000
12 6040838558884497984000000
13 53797620867616662708672000000
14 871394214986903051252166758400000