# A168560 (b-file synthesized from sequence entry) 1 1 2 2 3 2 4 3 5 4 6 4 7 5 8 5 9 6 10 10 11 7 12 8 13 9 14 9 15 10 16 10 17 11 18 12 19 12 20 13 21 13