228432domain: NAppears in sequencesTriangle T(n,k) of the numbers of nodes in all non-extendable (complete) non-self-adjacent simple paths within a square lattice bounded by rectangles with nodal dimensions n and k, n >= k >= 2.at n=17A21439710-step Fibonacci sequence starting with 0,0,1,0,0,0,0,0,0,0.at n=28A251765