Largest prime factor of A023199(n).

Terms

a(0) =3a(1) =5a(2) =11a(3) =17a(4) =29a(5) =53a(6) =89a(7) =157a(8) =271a(9) =487a(10) =857a(11) =1487a(12) =2621a(13) =4567a(14) =8011a(15) =13999a(16) =24499a(17) =42901a(18) =75401a(19) =132169a(20) =231431a(21) =406207a(22) =711617a(23) =1247761a(24) =2186941