119665domain: NAppears in sequencesNumber of active (ON, black) cells at stage 2^n-1 of the two-dimensional cellular automaton defined by "Rule 942", based on the 5-celled von Neumann neighborhood.at n=8A273796Expansion of (1-x^2)/((1-x-x^2)*(1-x-x^4)).at n=23A291311