# A045749 (b-file synthesized from sequence entry) 0 0 1 1 2 2 3 3 4 5 5 6 6 7 7 9 8 10 9 11 10 13 11 14 12 15 13 16 14 17 15 18 16 20 17 21 18 22 19 24 20 25 21 26 22 28 23 29 24 30 25 31 26 32 27 33 28 35 29 36 30 37 31 39 32 40 33 41 34 43 35 44 36 45 37 46 38 47 39 48 40 50 41 51 42 52 43 54 44 55 45 56 46 58 47 59 48 60 49 62 50 63 51 64 52 66 53 67 54 68