-2683

Appears in sequences

• a(n) = (-1)*a(n-1) + 3*a(n-2) with a(1)=-1 and a(2)=1.at n=10A140167
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 481", based on the 5-celled von Neumann neighborhood.at n=37A272458
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 489", based on the 5-celled von Neumann neighborhood.at n=37A272513