# A249754 (b-file synthesized from sequence entry) 0 1 1 2 2 7 3 51 4 814 5 27562 6 1881132 7 252352192 8 66437453648 9 34544598832464 10 35670629662833824 11 73386908116413720320 12 301341520134976454507520 13 2471940307185604520086223360 14 40530105576773294054842498631680 15 1328619037998490196005266772240585728 16 87091009170221273841091095272951672891392