# A004272 (b-file synthesized from sequence entry) 0 0 1 1 2 2 3 3 4 4 5 5 6 6 7 8 8 10 9 12 10 14 11 16 12 18 13 20 14 22 15 24 16 26 17 28 18 30 19 32 20 34 21 36 22 38 23 40 24 42 25 44 26 46 27 48 28 50 29 52 30 54 31 56 32 58 33 60 34 62 35 64 36 66 37 68 38 70 39 72 40 74 41 76 42 78 43 80 44 82 45 84 46 86 47 88 48 90 49 92 50 94 51 96 52 98 53 100 54 102 55 104