Number of isomorphism classes of n-fold coverings of a connected graph with Betti number 3.

A152612

Number of isomorphism classes of n-fold coverings of a connected graph with Betti number 3.

Terms

    a(0) =1a(1) =8a(2) =49a(3) =681a(4) =14721a(5) =524137a(6) =25471105a(7) =1628116890a(8) =131789656610

External references