Numbers k such that 2*3^k + 1 is prime.

Terms

a(0) =0a(1) =1a(2) =2a(3) =4a(4) =5a(5) =6a(6) =9a(7) =16a(8) =17a(9) =30a(10) =54a(11) =57a(12) =60a(13) =65a(14) =132a(15) =180a(16) =320a(17) =696a(18) =782a(19) =822a(20) =897a(21) =1252a(22) =1454a(23) =4217a(24) =5480a(25) =6225a(26) =7842a(27) =12096a(28) =13782a(29) =17720