# A251713 (b-file synthesized from sequence entry) 0 0 1 0 2 1 3 0 4 0 5 0 6 0 7 1 8 2 9 4 10 7 11 14 12 28 13 56 14 112 15 223 16 444 17 884 18 1761 19 3508 20 6988 21 13920 22 27728 23 55233 24 110022 25 219160 26 436559 27 869610 28 1732232 29 3450544 30 6873360 31 13691487 32 27272952 33 54326744 34 108216929 35 215564248 36 429396264 37 855341984 38 1703810608 39 3393929729