# A149760 (b-file synthesized from sequence entry) 0 1 1 1 2 5 3 19 4 71 5 287 6 1227 7 5225 8 22533 9 98501 10 435789 11 1937773 12 8674229 13 39013929 14 176395377 15 800429171 16 3645660451 17 16650259179 18 76271644403 19 350201421263 20 1611730662275 21 7431609599983 22 34333249277507 23 158871090135623 24 736334386517187 25 3417419972522207 26 15882375410713987 27 73900270630169779