100000101111domain: NAppears in sequencesa(n) = Sum_{ k, k|n } 10^(k-1).at n=11A113999Binary representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 502", based on the 5-celled von Neumann neighborhood.at n=13A282683