Numbers k such that (5*3^k + 7)/2 is prime.

Terms

a(0) =1a(1) =3a(2) =7a(3) =9a(4) =19a(5) =27a(6) =57a(7) =69a(8) =163a(9) =175a(10) =357a(11) =379a(12) =3045a(13) =38425a(14) =70375a(15) =99975