-3492domain: 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 251", based on the 5-celled von Neumann neighborhood.at n=37A271019Expansion of Product_{k>=1} 1/(1 + x^k)^(k*(5*k-3)/2).at n=10A295122