# A338550 (b-file synthesized from sequence entry) 0 1 1 1 2 4 3 60 4 3360 5 705600 6 558835200 7 1678182105600 8 19198403288064000 9 840083731079104512000 10 141100463472046393835520000 11 91242050302344912388163665920000 12 227753296409896438988240405704212480000 13 2199573010737856838816729366169572868096000000 14 82356764599728553816070191604819734458909327360000000