# A291867 (b-file synthesized from sequence entry) 1 1 2 3 3 5 4 7 5 13 6 18 7 45 8 73 9 165 10 174 11 298 12 502 13 563 14 901 15 1033 16 1164 17 1181 18 2040 19 4165 20 20389 21 23608 22 34542 23 88761