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

A081013

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

Terms

    a(0) =0a(1) =11a(2) =87a(3) =608a(4) =4179a(5) =28655a(6) =196416a(7) =1346267a(8) =9227463a(9) =63245984a(10) =433494435a(11) =2971215071a(12) =20365011072a(13) =139583862443a(14) =956722026039

External references