# A094198 (b-file synthesized from sequence entry) 1 1 2 2 3 6 4 24 5 119 6 702 7 4795 8 37183 9 322486 10 3091630 11 32453172 12 370104159 13 4555518746 14 60182704891 15 849245520581 16 12746759647944 17 202753756944382 18 3406596290534764 19 60282041591986049 20 1120554350714688128