# A222177 (b-file synthesized from sequence entry) 0 0 1 1 2 2 3 2 4 2 5 4 6 6 7 4 8 2 9 4 10 8 11 8 12 6 13 10 14 14 15 8 16 2 17 4 18 8 19 12 20 16