7634944

Appears in sequences

• a(n) = -2*a(n-1) + 4*a(n-2), a(0)=1, a(1)=2.at n=15A087205
• Harary index for the n-Keller graph.at n=5A296189
• a(n) = 2^(n-1)*Fibonacci(n-3), n >= 0.at n=16A319196