56829domain: NAppears in sequencesTriangle read by rows: T(n,k) is the number of noncrossing trees with n edges in which the leftmost leaf is at level k.at n=38A101409Subtriangle of generalized Catalan triangle CM(1,2) = A116880.at n=26A116872Generalized Catalan triangle, called CM(1,2).at n=33A116880