# A216209 (b-file synthesized from sequence entry) 0 0 1 1 2 2 3 3 4 2 5 3 6 4 7 5 8 6 9 3 10 4 11 5 12 6 13 7 14 8 15 9 16 4 17 5 18 6 19 7 20 8 21 9 22 10 23 11 24 12 25 5 26 6 27 7 28 8 29 9 30 10 31 11 32 12 33 13 34 14 35 15 36 6 37 7 38 8 39 9 40 10 41 11 42 12 43 13 44 14 45 15 46 16 47 17 48 18 49 7 50 8 51 9 52 10 53 11 54 12 55 13 56 14 57 15 58 16 59 17 60 18 61 19 62 20 63 21