# A274688 (b-file synthesized from sequence entry) 1 -2 2 3 3 -5 4 7 5 -8 6 9 7 -11 8 12 9 -13 10 15 11 -17 12 19 13 -20 14 21 15 -23 16 25 17 -27 18 28 19 -29 20 31 21 -32 22 33 23 -35 24 36 25 -37 26 39 27 -41 28 43 29 -44 30 45 31 -47 32 48 33 -49 34 51 35 -52 36 53 37 -55 38 57 39 -59 40 60 41 -61 42 63 43 -65 44 67 45 -68 46 69 47 -71 48 73 49 -75 50 76 51 -77 52 79 53 -80 54 81 55 -83 56 84 57 -85 58 87 59 -89