91871domain: NAppears in sequencesa(n) = (3*4^n - 2*3^n + 2^n)/2.at n=8A083330Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 929", based on the 5-celled von Neumann neighborhood.at n=40A273781