-4459

Appears in sequences

• a(n) = -a(n-1) - a(n-2) + a(n-3), a(0)=3, a(1)=-1, a(2)=-1.at n=27A073145
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 237", based on the 5-celled von Neumann neighborhood.at n=39A270983
• Expansion of 1/(1 - 2*x + 3*x^2 + 2*x^3 + x^4).at n=12A375255