-5136domain: ZAppears in sequencesFirst differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 195", based on the 5-celled von Neumann neighborhood.at n=41A270692E.g.f.: (exp(1 - exp(x)) - 1)^2 / 2.at n=8A341586