# A028331 (b-file synthesized from sequence entry) 0 6 1 8 2 20 3 10 4 30 5 12 6 70 7 42 8 14 9 112 10 56 11 16 12 252 13 168 14 72 15 18 16 420 17 240 18 90 19 20 20 924 21 660 22 330 23 110 24 22 25 1584 26 990 27 440 28 132 29 24 30 3432 31 2574 32 1430 33 572 34 156 35 26 36 6006 37 4004 38 2002 39 728 40 182 41 28 42 12870 43 10010 44 6006 45 2730 46 910 47 210 48 30 49 22880 50 16016