# A007235 (b-file synthesized from sequence entry) 1 8 2 27 3 384 4 12100 5 736128 6 70990416 7 9939419136 8 1896254551296 9 472882821120000 10 149328979405056000 11 58255835226557644800 12 27519543889780053196800 13 15483244831426302168268800 14 10231838708930053383168000000