187036domain: NAppears in sequencesNumber of closed walks of length n at a vertex of the cyclic graph on 7 nodes C_7.at n=20A094659Number of cyclic subgroups of the group GL(2, Z(n)), counting conjugates as distinct.at n=38A316560a(n) = n * (7*binomial(n, 2) + 1).at n=38A329530