Smallest prime factor of Fibonacci(3n)-1, i.e., A020639(A000071(3n)).

Terms

a(0) =7a(1) =3a(2) =11a(3) =3a(4) =3a(5) =5a(6) =199a(7) =13a(8) =13a(9) =3a(10) =37a(11) =3a(12) =3a(13) =89a(14) =5a(15) =11a(16) =7a(17) =3a(18) =59a(19) =3a(20) =3a(21) =11a(22) =11a(23) =37a(24) =37a(25) =3a(26) =370248451a(27) =3a(28) =3a(29) =139