a(n) = Fibonacci(5*n).

Terms

a(0) =0a(1) =5a(2) =55a(3) =610a(4) =6765a(5) =75025a(6) =832040a(7) =9227465a(8) =102334155a(9) =1134903170a(10) =12586269025a(11) =139583862445