1163220309

Appears in sequences

• a(n) = a(n-1) + 4a(n-2) - 4a(n-3).at n=30A136326
• a(n) = 5*a(n-1) - 9*a(n-2) + 8*a(n-3) - 4*a(n-4), with a(0)=0, a(1)=0, a(2)=0, a(3)=1.at n=28A137221
• Decimal representation of the middle column of the "Rule 91" elementary cellular automaton starting with a single ON (black) cell.at n=30A267045
• Number of active (ON, black) cells at stage 2^n-1 of the two-dimensional cellular automaton defined by "Rule 526", based on the 5-celled von Neumann neighborhood.at n=15A272743
• a(n) = 4^(n+1) + (4^n-1)/3.at n=14A330246