Numbers n such that 7*3^(2*n)+5*3^n+1 is prime.

Terms

a(0) =0a(1) =1a(2) =2a(3) =5a(4) =7a(5) =8a(6) =20a(7) =25a(8) =43a(9) =95a(10) =326a(11) =383a(12) =434a(13) =517a(14) =884a(15) =1147a(16) =1303a(17) =2779a(18) =17237a(19) =49867a(20) =81427a(21) =100967