73875domain: NAppears in sequencesG.f. satisfies: A(x) = x^2 + x^3 + A(A(x)).at n=15A213905Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 569", based on the 5-celled von Neumann neighborhood.at n=40A272993