26667864domain: NAppears in sequencesClosed walks of length n along the edges of a pentagon based at a vertex.at n=27A054877Number of walks of length 2n+1 between two nodes at distance 5 in the cycle graph C_10.at n=11A095933a(n) = Sum_{k>=0} binomial(n,5*k+1).at n=27A133476sum_{k=floor[(n+5)/2] mod 5} C(n,k).at n=27A173126