# A190909 (b-file synthesized from sequence entry) 0 1 1 1 2 1 3 1 4 3 5 2 6 1 7 6 8 10 9 6 10 1 11 10 12 30 13 42 14 6 15 1 16 15 17 70 18 168 19 54 20 30 21 1 22 21 23 140 24 504 25 270 26 330 27 20 28 1 29 28 30 252 31 1260 32 990 33 1980 34 260 35 140 36 1 37 36 38 420 39 2772 40 2970 41 8580 42 1820 43 2100 44 70 45 1 46 45 47 660 48 5544 49 7722 50 30030 51 9100 52 16800 53 1190 54 630