# A198204 (b-file synthesized from sequence entry) 1 1 2 1 3 2 4 1 5 9 6 12 7 1 8 28 9 120 10 120 11 1 12 75 13 750 14 2100 15 1680 16 1 17 186 18 3780 19 21840 20 45360 21 30240 22 1 23 441 24 16856 25 176400 26 705600 27 1164240 28 665280 29 1 30 1016 31 69552 32 1224720 33 8316000 34 25280640 35 34594560 36 17297280 37 1 38 2295 39 272250 40 7692300 41 82577880 42 408648240 43 998917920 44 1167566400 45 518918400