191536

Appears in sequences

• Number of outcomes of unlabeled n-team round-robin tournaments.at n=9A000568
• E.g.f. satisfies: A(x) = exp(2*x) * A(-x).at n=9A275764
• Triangle read by rows: T(n,k) is the number of oriented graphs on n unlabeled nodes whose underlying graph is k-regular, k = 0..n-1.at n=44A350912