# A004499 (b-file synthesized from sequence entry) 0 10 1 11 2 9 3 13 4 14 5 12 6 16 7 17 8 15 9 19 10 20 11 18 12 22 13 23 14 21 15 25 16 26 17 24 18 1 19 2 20 0 21 4 22 5 23 3 24 7 25 8 26 6 27 37 28 38 29 36 30 40 31 41 32 39 33 43 34 44 35 42 36 46 37 47 38 45 39 49 40 50 41 48 42 52 43 53 44 51 45 28 46 29 47 27 48 31 49 32 50 30 51 34 52 35 53 33 54 64 55 65 56 63 57 67