# A028756 (b-file synthesized from sequence entry) 1 2 2 3 3 5 4 7 5 8 6 12 7 18 8 19 9 20 10 22 11 26 12 27 13 28 14 29 15 30 16 32 17 33 18 34 19 37 20 39 21 42