a(n) = Fibonacci(4n+3) + 1, or Fibonacci(2n+1)*Lucas(2n+2).

A081005

a(n) = Fibonacci(4n+3) + 1, or Fibonacci(2n+1)*Lucas(2n+2).

Terms

    a(0) =3a(1) =14a(2) =90a(3) =611a(4) =4182a(5) =28658a(6) =196419a(7) =1346270a(8) =9227466a(9) =63245987a(10) =433494438a(11) =2971215074a(12) =20365011075a(13) =139583862446a(14) =956722026042

External references