4543829

Appears in sequences

• a(n) = a(n-1) + 4a(n-2) - 4a(n-3).at n=22A136326
• Decimal representation of the middle column of the "Rule 91" elementary cellular automaton starting with a single ON (black) cell.at n=22A267045
• 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=11A272743
• a(n) = 4^(n+1) + (4^n-1)/3.at n=10A330246
• For numbers x_n coprime to 10 there exist infinitely many binary numbers b such that gcd(b,rev(b)) = x_n and digitsum(b) = x_n. a(n) is the smallest b converted to decimal that satisfies this constraint.at n=4A348480