Number of isomorphism classes of n-fold coverings of a connected graph with Betti number 4.

A160446

Number of isomorphism classes of n-fold coverings of a connected graph with Betti number 4.

Terms

    a(0) =1a(1) =16a(2) =251a(3) =14491a(4) =1730861a(5) =373486525a(6) =128038522439

External references