2236960

Appears in sequences

• a(0)=-4; a(n+1) = 2*a(n) + period 4: repeat 6,1,2,5.at n=25A180343
• Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 529", based on the 5-celled von Neumann neighborhood.at n=21A282918