13743895348domain: NAppears in sequencesNumber of closed walks of length n on the complete graph on 5 nodes from a given node.at n=18A109499a(n) = 3*a(n-1) + 4*a(n-2) - a(n-3) + 3*a(n-4) + 4*a(n-5).at n=17A135343