a(1) = a(2) = 1; for n >2, a(n) = smallest prime factor of n-th Fibonacci number.

Terms

a(0) =1a(1) =1a(2) =2a(3) =3a(4) =5a(5) =2a(6) =13a(7) =3a(8) =2a(9) =5a(10) =89a(11) =2a(12) =233a(13) =13a(14) =2a(15) =3a(16) =1597a(17) =2a(18) =37a(19) =3a(20) =2a(21) =89a(22) =28657a(23) =2a(24) =5a(25) =233a(26) =2a(27) =3a(28) =514229a(29) =2