68780domain: NAppears in sequencesa(n) = n*(n+1)*(n^2+1)/2.at n=19A071237Number of active (ON, black) cells at stage 2^n-1 of the two-dimensional cellular automaton defined by "Rule 310", based on the 5-celled von Neumann neighborhood.at n=8A271196a(n) = n * sigma_2(n).at n=37A328259