Numbers k such that 3^k - 8 is prime.

Terms

a(0) =3a(1) =4a(2) =7a(3) =8a(4) =14a(5) =20a(6) =22a(7) =62a(8) =139a(9) =254a(10) =272a(11) =430a(12) =907a(13) =1906a(14) =2278a(15) =2827a(16) =3598a(17) =6812a(18) =15266a(19) =20915a(20) =26180a(21) =26342a(22) =27022a(23) =48275a(24) =65186a(25) =69247a(26) =86647