# A053071 (b-file synthesized from sequence entry)
1 0
2 2
3 48
4 4480
5 2887680
6 5373624320
7 44196975083520
8 1442855588252876800
9 188570467779447305011200
10 98800579402758985681259724800
11 207089099087390763078860569942425600