# A149655 (b-file synthesized from sequence entry) 0 1 1 1 2 5 3 15 4 75 5 289 6 1445 7 6095 8 30475 9 135117 10 675585 11 3087987 12 15439935 13 72008619 14 360043095 15 1703029437 16 8515147185 17 40694381623 18 203471908115 19 979988489573 20 4899942447865 21 23742016308033 22 118710081540165 23 577930415357795 24 2889652076788975 25 14121788791089079 26 70608943955445395 27 346141784385418635