101498domain: NAppears in sequencesa(n)=c(n)+c(n-1)+2*c(n-2)+4*c(n-3)+8*c(n-4)+...+2^(n-2)*c(1)+2^(n-1)*c(0), where c(k) are the Catalan numbers (A000108).at n=11A126221Number of n-node unlabeled rooted trees with thinning limbs and root outdegree (branching factor) 10.at n=15A244711