Fibonacci numbers F(k) for k squarefree (A005117).

Terms

a(0) =1a(1) =1a(2) =2a(3) =5a(4) =8a(5) =13a(6) =55a(7) =89a(8) =233a(9) =377a(10) =610a(11) =1597a(12) =4181a(13) =10946a(14) =17711a(15) =28657a(16) =121393a(17) =514229a(18) =832040a(19) =1346269a(20) =3524578a(21) =5702887a(22) =9227465a(23) =24157817a(24) =39088169a(25) =63245986a(26) =165580141a(27) =267914296a(28) =433494437a(29) =1836311903