Number of labeled n-node 4-valent graphs containing a single double edge.

A058830

Number of labeled n-node 4-valent graphs containing a single double edge.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =90a(7) =3150a(8) =131040a(9) =6667920a(10) =416593800a(11) =31506454980

External references