Number of cyclic multigraphs on n labeled edges (without loops).

A020562

Number of cyclic multigraphs on n labeled edges (without loops).

Terms

    a(0) =1a(1) =1a(2) =3a(3) =17a(4) =152a(5) =1933a(6) =32608a(7) =695657a(8) =18148533a(9) =564860131a(10) =20581455139a(11) =864802010595

External references