Total number of multiple edges in all essentially series series-parallel networks with n labeled edges, multiple edges allowed.

A058477

Total number of multiple edges in all essentially series series-parallel networks with n labeled edges, multiple edges allowed.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =3a(4) =20a(5) =225a(6) =3074a(7) =50365a(8) =958880a(9) =20786745a(10) =505233986a(11) =13603353929a(12) =401819713272

External references