Largest prime divisor of Fibonacci(5n).

Terms

a(0) =5a(1) =11a(2) =61a(3) =41a(4) =3001a(5) =61a(6) =141961a(7) =2161a(8) =109441a(9) =3001a(10) =474541a(11) =2521a(12) =14736206161a(13) =141961a(14) =230686501a(15) =3041a(16) =3415914041a(17) =109441a(18) =67735001a(19) =570601a(20) =8288823481a(21) =474541a(23) =20641a(25) =14736206161a(27) =12317523121