a(n) = Fibonacci(4n)-3, or Fibonacci(2n-2)*Lucas(2n+2).

A081074

a(n) = Fibonacci(4n)-3, or Fibonacci(2n-2)*Lucas(2n+2).

Terms

    a(0) =0a(1) =18a(2) =141a(3) =984a(4) =6762a(5) =46365a(6) =317808a(7) =2178306a(8) =14930349a(9) =102334152a(10) =701408730a(11) =4807526973a(12) =32951280096a(13) =225851433714

External references