# A054185 (b-file synthesized from sequence entry) 0 1 1 3 2 8 3 20 4 49 5 119 6 290 7 714 8 1781 9 4507 10 11580 11 30208 12 79941 13 214327 14 581292 15 1592496 16 4400765 17 12251895 18 34326566 19 96694866 20 273639617 21 777444807 22 2216341466 23 6336999666 24 18165573373 25 52191551315 26 150254448730 27 433350470586