-4139

Appears in sequences

• Expansion of (1-x)^(-1)/(1-x+2*x^2).at n=24A077876
• Expansion of g.f.: (1+3*x^2)/((1-x)*(1+x+2*x^2)*(1-x+2*x^2)).at n=24A107443
• Expansion of g.f.: (1+3*x^2)/((1-x)*(1+x+2*x^2)*(1-x+2*x^2)).at n=25A107443
• Expansion of g.f. (1+3*x)/((1-x)*(1+3*x+4*x^2)).at n=12A174565
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 345", based on the 5-celled von Neumann neighborhood.at n=33A271296
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 473", based on the 5-celled von Neumann neighborhood.at n=37A272426