# A053877 (b-file synthesized from sequence entry) 1 0 2 0 3 0 4 0 5 624960 6 944939520 7 4266926899200 8 71625854051942400 9 1986746267331377233920 10 164332724129181202215075840 11 47899373560729916144902314393600 12 52417115824922043292862127287776051200 13 220441395199404954061534047500928748596756480