Primes of the form floor((7/6)^k).

Terms

a(0) =2a(1) =3a(2) =5a(3) =7a(4) =11a(5) =13a(6) =29a(7) =47a(8) =101a(9) =257a(10) =349a(11) =1201a(12) =1907a(13) =3533a(14) =122449a(15) =360233a(16) =420271a(17) =9172043a(18) =10700717a(19) =11015860931a(20) =825141735599