Numbers k such that 2*3^k + 7 is prime.

Terms

a(0) =1a(1) =3a(2) =9a(3) =11a(4) =15a(5) =17a(6) =24a(7) =41a(8) =68a(9) =72a(10) =641a(11) =716a(12) =1139a(13) =1200a(14) =1661a(15) =3339a(16) =5181a(17) =68769