# A128098 (b-file synthesized from sequence entry) 1 1 2 4 3 11 4 30 5 80 6 214 7 574 8 1548 9 4197 10 11440 11 31339 12 86252 13 238407 14 661584 15 1842585 16 5148960 17 14432643 18 40569804 19 114339777 20 323031750 21 914683602 22 2595411126 23 7378861196 24 21016701652 25 59962687675 26 171353419536 27 490407962229