-4396

Appears in sequences

• G.f. satisfies: A(x) = 1 + x*(A(x) + A(-x)) + x^2*A(x)*A(-x).at n=17A208888
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 139", based on the 5-celled von Neumann neighborhood.at n=41A270281
• Expansion of Product_{i>=1, j>=1, k>=1, l>=1} (1 - x^(i*j*k*l))/(1 + x^(i*j*k*l)).at n=16A321302