a(n) = Fibonacci(4n+1) - 2, or Fibonacci(2n+2)*Lucas(2n-1).

A081012

a(n) = Fibonacci(4n+1) - 2, or Fibonacci(2n+2)*Lucas(2n-1).

Terms

    a(0) =3a(1) =32a(2) =231a(3) =1595a(4) =10944a(5) =75023a(6) =514227a(7) =3524576a(8) =24157815a(9) =165580139a(10) =1134903168a(11) =7778742047a(12) =53316291171a(13) =365435296160

External references