1528095domain: NAppears in sequencesDecimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 169", based on the 5-celled von Neumann neighborhood.at n=20A279547a(n) = A349976(n, n-1) for n >= 1 and a(0) = 0.at n=23A349972