Number of cyclic oriented multigraphs on n labeled arcs (with loops).

A020565

Number of cyclic oriented multigraphs on n labeled arcs (with loops).

Terms

    a(0) =1a(1) =2a(2) =15a(3) =205a(4) =4202a(5) =118096a(6) =4300364a(7) =195155304a(8) =10727473182a(9) =698874420944

External references