48129domain: NAppears in sequencesExpansion of (1-x)^(-1)/(1+2*x-2*x^3).at n=29A077924Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 355", based on the 5-celled von Neumann neighborhood.at n=41A271399