# A172974 (b-file synthesized from sequence entry) 0 2 1 3 2 4 3 5 4 6 5 7 6 8 7 9 8 10 9 11 10 12 11 14 12 15 13 20 14 21 15 28 16 35 17 36 18 45 19 50 20 55 21 56 22 66 23 70 24 78 25 84 26 91