68298domain: NAppears in sequencesPartial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 587", based on the 5-celled von Neumann neighborhood.at n=41A273079Expansion of Product_{k>=1} (1 - x^k)^(k*(k+1)*(2*k+1)/6).at n=15A319757