-2443domain: 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 393", based on the 5-celled von Neumann neighborhood.at n=33A271605Expansion of e.g.f. x*exp(-x) / BesselI(1,2*x).at n=9A308846