# A183117 (b-file synthesized from sequence entry) 0 0 1 1 2 3 3 7 4 19 5 53 6 153 7 451 8 1339 9 3997 10 11961 11 35835 12 107435 13 322197 14 966425 15 2899027 16 8696699 17 26089517 18 78267673 19 234801675 20 704402987 21 2113205861 22 6339612857 23 19018831395 24 57056483259 25 171169433149 26 513508274169 27 1540524784027 28 4621574293547 29 13864722791605 30 41594168239321