# A138887 (b-file synthesized from sequence entry) 0 0 1 1 2 4 3 6 4 7 5 8 6 9 7 10 8 12 9 13 10 14 11 15 12 16 13 17 14 18 15 19 16 20 17 21 18 22 19 24 20 25 21 26 22 27 23 28 24 30 25 31 26 32 27 33 28 34 29 35 30 36 31 37 32 38 33 39 34 40 35 42 36 43 37 44 38 45 39 46 40 47 41 48 42 49 43 50 44 51 45 52 46 54 47 55 48 56 49 57 50 58 51 59 52 60 53 61 54 62 55 63 56 64 57 65 58 66 59 67 60 68