# A205504 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 4 4 11 5 27 6 92 7 252 8 906 9 2787 10 10191 11 31594 12 125998 13 393021 14 1535964 15 5161328 16 20221291 17 66306664 18 273756969 19 897440988 20 3664037417 21 12621555612 22 50496343297 23 170909672792 24 725703552284 25 2427269270146 26 9982179588261 27 35179417316991 28 143999051236064