6533120domain: NAppears in sequencesExpansion of x^4*(5 - 16*x + 13*x^2)/(1 - 2*x)^4.at n=18A268587Decimal representation of the diagonal from the origin to the corner of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 435", based on the 5-celled von Neumann neighborhood.at n=22A288295