# A052592 (b-file synthesized from sequence entry) 0 1 1 3 2 24 3 288 4 4608 5 92160 6 2211840 7 61931520 8 1981808640 9 71345111040 10 2853804441600 11 125567395430400 12 6027234980659200 13 313416218994278400 14 17551308263679590400 15 1053078495820775424000 16 67397023732529627136000