1135957

Appears in sequences

• a(n) = (n + 1/3)*2^(n-1) - 1/2 + (-1)^(n-1)*(1/6).at n=16A127981
• a(n) = a(n-1) + 4a(n-2) - 4a(n-3).at n=20A136326
• Decimal representation of the middle column of the "Rule 91" elementary cellular automaton starting with a single ON (black) cell.at n=20A267045
• 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=10A272743
• a(n) = 4^(n+1) + (4^n-1)/3.at n=9A330246