Number of labeled n-node 4-valent graphs containing two nonadjacent double edges.

A058831

Number of labeled n-node 4-valent graphs containing two nonadjacent double edges.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =0a(4) =3a(5) =30a(6) =405a(7) =10080a(8) =369180a(9) =17959158a(10) =1092909510a(11) =81043601760

External references