82031250domain: NAppears in sequencesNumber of labeled 4-trees with n nodes.at n=9A036506Triangle read by rows: T(n,r) = number of maximum r-uniform acyclic hypergraphs of order n and size n-r+1, 1 <= r <= n+1.at n=59A135021Hypotenuses for which there exist exactly 9 distinct integer triangles.at n=25A290500