# A127303 (b-file synthesized from sequence entry) 1 1 2 2 3 11 4 12 5 111 6 212 7 1111 8 1212 9 11111 10 21212 11 111111 12 221212 13 1111111 14 1221212 15 11111111 16 11221212 17 111111111 18 211221212 19 1111111111 20 2211221212