75207domain: NAppears in sequences24-hedral numbers: a(n) = (2*n + 1)*(8*n^2 + 14*n + 7).at n=16A254473Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 542", based on the 5-celled von Neumann neighborhood.at n=39A289094