Largest prime factor of 3^n-2.

Terms

a(0) =7a(1) =5a(2) =79a(3) =241a(4) =727a(5) =23a(6) =937a(7) =19681a(8) =431a(9) =499a(10) =4703a(11) =8093a(12) =40193a(13) =2869781a(14) =483671a(15) =94747a(16) =4657a(17) =232452293a(18) =498112057a(19) =2812679a(20) =31381059607a(21) =3765727153a(22) =1364071a(23) =44594137339a(24) =125231a(25) =13170403a(26) =5353801183a(27) =4159349a(28) =46050353857a(29) =294487079