270548992domain: NAppears in sequencesDecimal 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 233", based on the 5-celled von Neumann neighborhood.at n=28A286969a(n) = n^7 * Sum_{d^2|n} 1 / d^7.at n=15A351605