# A005870 (b-file synthesized from sequence entry) 1 0 2 3 3 6 4 8 5 9 6 11 7 12 8 15 9 17 10 18 11 19 12 20 13 21 14 22 15 25 16 27 17 29 18 30 19 31 20 32 21 33 22 34 23 35 24 36 25 37 26 39 27 41 28 43 29 44 30 45 31 46 32 47 33 48 34 49 35 51 36 53 37 54 38 55 39 56 40 57 41 59 42 61 43 63 44 65 45 66 46 67 47 68 48 69 49 70 50 71 51 72 52 75