32433domain: NAppears in sequencesSum of upward diagonals of Eulerian triangle.at n=11A000800a(n) = 3 + floor((2 + Sum_{j=1..n-1} a(j))/5).at n=51A120172Number of trees with n unlabeled nodes such that all nodes with degree >2 lie on a single path with length equal to the tree's diameter.at n=17A277795