Largest prime factor of 3^n+2.

Terms

a(0) =3a(1) =5a(2) =11a(3) =29a(4) =83a(5) =7a(6) =43a(7) =199a(8) =6563a(9) =127a(10) =59051a(11) =25307a(12) =48313a(13) =63773a(14) =4782971a(15) =14348909a(16) =119243a(17) =335429a(18) =23203a(19) =10613a(20) =60089a(21) =1224149a(22) =795323a(23) =919a(24) =282429536483a(25) =1583717027a(27) =693236134999a(28) =174632003473