Smallest odd prime p such that n=(p-1)/ord_p(3).

Terms

a(0) =5a(1) =11a(2) =67a(3) =13a(4) =41a(5) =61a(6) =883a(7) =313a(8) =271a(9) =431a(10) =5743a(11) =193a(12) =3511a(13) =1583a(14) =2131a(15) =433a(16) =2551a(17) =4177a(18) =8513a(19) =2521a(20) =8779a(21) =683a(22) =10627a(23) =1321a(24) =29851a(25) =1223a(26) =3079a(27) =9661a(28) =49939a(29) =661