Number of subgroups of index n in fundamental group of a certain fiber space.

A027841

Number of subgroups of index n in fundamental group of a certain fiber space.

Terms

    a(0) =1a(1) =31a(2) =301a(3) =6491a(4) =151711a(5) =6673555a(6) =362072313a(7) =26375525171

External references