# A306760 (b-file synthesized from sequence entry)
0 1
1 2
2 90
3 705600
4 4105057320000
5 52487876090562232320000
6 3487017405172854771910634342400000000
7 2448893405298238642974553493547144534294528000000000000
8 33257039167768610289435138215602132823918399655132218973388800000000000000000