Schroeder triangle sums: a(n) = A006603(n+1) - A006318(n+1).

A227504

Schroeder triangle sums: a(n) = A006603(n+1) - A006318(n+1).

Terms

    a(0) =1a(1) =4a(2) =17a(3) =74a(4) =335a(5) =1566a(6) =7515a(7) =36836a(8) =183709a(9) =929392a(10) =4758477a(11) =24611950a(12) =128411643a(13) =675051770a(14) =3572165431a(15) =19012868648a(16) =101718917721a(17) =546707554844

External references