-5533domain: ZAppears in sequencesExpansion of -x*(5*x^4+5*x^3-7*x-4)/((x^2-x-1)*(x^3+x^2-1)).at n=23A134186First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 121", based on the 5-celled von Neumann neighborhood.at n=43A270209