47637

Appears in sequences

• a(n) = 3*a(n-3) + a(n-2), a(0)=3, a(1)=0, a(2)=2.at n=21A231101
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 641", based on the 5-celled von Neumann neighborhood.at n=32A273311