13530350domain: NAppears in sequencesClosed walks of length n along the edges of a pentagon based at a vertex.at n=26A054877Number of closed walks of length 2n at a vertex of the cyclic graph on 10 nodes C_10.at n=13A095929a(n) = Sum_{ k >= 0} binomial(n,5*k+3).at n=26A139748a(n) = Sum_{k == floor(n/2) (mod 5)} C(n,k).at n=26A173125