-1867domain: ZAppears in sequencesa(n) = 2*n^3 - 163*n^2 + 2777*n - 11927.at n=5A218458First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 425", based on the 5-celled von Neumann neighborhood.at n=27A272092