1896448domain: NAppears in sequencesa(n) = 2^n*(n^3 - 3*n^2 + 2*n + 48)/48.at n=15A081913Decimal representation of the diagonal from the origin to the corner of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 974", based on the 5-celled von Neumann neighborhood.at n=20A290851