267914297

Appears in sequences

• Expansion of (2-6*x+4*x^2-x^3)/((1-x)*(1-3*x+x^2)).at n=21A052925
• a(n) = 3*a(n-1) - a(n-2) - 1 with a(0) = 1 and a(1) = 2.at n=21A055588
• a(n) = Fibonacci(4n+2) + 1, or Fibonacci(2n+2)*Lucas(2n).at n=10A081004
• a(n) = F(n)*L(n-2) where F = Fibonacci and L = Lucas numbers.at n=22A128535
• a(2n) = A000045(6n) + 1, a(2n+1) = A000045(6n+3) - 1.at n=14A140413
• G.f.: Sum_{n>=1} Fibonacci(n+1) * x^n / (1 - x^n).at n=40A245282