# A217777 (b-file synthesized from sequence entry) 0 1 1 2 2 4 3 8 4 15 5 30 6 55 7 110 8 200 9 400 10 725 11 1450 12 2625 13 5250 14 9500 15 19000 16 34375 17 68750 18 124375 19 248750 20 450000 21 900000 22 1628125 23 3256250 24 5890625 25 11781250 26 21312500 27 42625000 28 77109375 29 154218750 30 278984375 31 557968750 32 1009375000 33 2018750000 34 3651953125