Number of isomorphism classes of n-fold coverings of a connected graph with Betti number 6.

A160448

Number of isomorphism classes of n-fold coverings of a connected graph with Betti number 6.

Terms

    a(0) =1a(1) =1a(2) =64a(3) =8051a(4) =7997683a(5) =24883501301

External references