529896

Appears in sequences

• Number of 2-trees rooted at an asymmetric end-edge.at n=10A063682
• Triangle read by rows. The coefficients of the Hahn polynomials in ascending order of powers. T(n, k) = n! * [x^k] hypergeom([-x, -n, n + 1], [1, 1], 1).at n=38A358624