# A368144 (b-file synthesized from sequence entry) 1 1 2 4 3 24 4 1155 5 337600 6 477339104 7 2872202028544 8 72057595967327280 9 7462505059899321934848 10 3169126500571074529208754688 11 5492677668532710795071525279789056 12 38716571525226776289479030777851808143360 13 1106936151351216411420552029913564174524281470976