# A241122 (b-file synthesized from sequence entry) 1 2 2 8 3 48 4 384 5 3840 6 46080 7 645120 8 10321920 9 2786918400 10 2229534720 11 735746457600 12 5885971660800 13 765176315904000 14 192824431607808000 15 385648863215616000 16 12340763622899712000 17 18881368343036559360000 18 15105094674429247488000