# A209518 (b-file synthesized from sequence entry) 0 1 1 1 2 3 3 1 4 4 5 6 6 1 7 5 8 10 9 10 10 1 11 6 12 15 13 20 14 15 15 1 16 7 17 21 18 35 19 35 20 21 21 1 22 8 23 28 24 56 25 70 26 56 27 28 28 1 29 9 30 36 31 84 32 126 33 126 34 84 35 36 36 1 37 10 38 45 39 120 40 210 41 252 42 210 43 120 44 45 45 1 46 11 47 55 48 165 49 330 50 462 51 462 52 330 53 165 54 55