288331

Appears in sequences

• G.f. A(x) satisfies: A( A(x)^2 - A(x)^3 ) = x*A(x).at n=14A268655
• Triangle read by rows: T(n,k) is the number of unlabeled weakly connected oriented graphs with n arcs and k vertices, k = 1..n+1.at n=62A350914
• Place n points in general position on each side of a square, and join every pair of the 4*n+4 boundary points by a chord; sequence gives number of regions in the resulting planar graph.at n=13A367121