# A272094 (b-file synthesized from sequence entry) 0 1 1 1 2 6 3 504 4 917280 5 48735086400 6 94925811409228800 7 8154182636726616909619200 8 36091760791026276649159689107865600 9 9415901310649088228943246038670339934863360000 10 162992165498634702043940163611264755298214594247272038400000