# A177877 (b-file synthesized from sequence entry) 0 1 1 2 2 4 3 3 4 7 5 10 6 4 7 10 8 16 9 20 10 5 11 13 12 22 13 30 14 35 15 6 16 16 17 28 18 40 19 50 20 56 21 7 22 19 23 34 24 50 25 65 26 77 27 84 28 8 29 22 30 40 31 60 32 80 33 98 34 112 35 120 36 9 37 25 38 46 39 70 40 95 41 119 42 140 43 156 44 165 45 10 46 28 47 52 48 80 49 110 50 140 51 168 52 192 53 210 54 220