-2799domain: ZAppears in sequencesFirst differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 337", based on the 5-celled von Neumann neighborhood.at n=29A271288Expansion of Product_{i>=1, j>=1, k>=1} (1 - x^(i*j*k)).at n=50A319359