# A003047 (b-file synthesized from sequence entry)
1 1
2 1
3 2
4 10
5 280
6 235200
7 173859840000
8 98238542885683200000000
9 32169371027674057560745102540800000000000000000
10 3518552669874927170883258602839130084576857453953842493259776000000000000000000000000000000000