# A091987 (b-file synthesized from sequence entry) 0 1 1 2 2 3 3 4 4 5 5 6 6 6 7 7 8 7 9 7 10 8 11 8 12 8 13 9 14 9 15 9 16 10 17 10 18 10 19 10 20 11 21 11 22 11 23 11 24 12 25 12 26 12 27 12 28 13 29 13 30 13 31 13 32 14 33 14 34 14 35 14 36 14 37 15 38 15 39 15 40 15 41 15 42 16 43 16 44 16 45 16 46 16 47 17 48 17 49 17 50 17 51 17 52 18 53 18 54 18 55 18 56 18 57 19 58 19 59 19 60 19 61 19 62 20 63 20 64 20