Numbers k such that 3^k + 3^4 + 1 is prime.

Terms

a(0) =0a(1) =3a(2) =4a(3) =6a(4) =7a(5) =22a(6) =28a(7) =39a(8) =115a(9) =144a(10) =379a(11) =391a(12) =858a(13) =1851a(14) =5815a(15) =7495a(16) =7686a(17) =7726a(18) =9636a(19) =13006a(20) =19063a(21) =19719a(22) =21202a(23) =25516a(24) =26542a(25) =31204a(26) =53655a(27) =54294a(28) =68431