# A132053 (b-file synthesized from sequence entry) 8 1 9 108 10 7470 11 429660 12 22629915 13 1143782640 14 56936699820 15 2835191759400 16 142610008065525 17 7291723635296100 18 380553986882119050 19 20327650785482940900 20 1113292728197378103375 21 62584367768103890709000