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

Terms

a(0) =1a(1) =2a(2) =5a(3) =6a(4) =7a(5) =10a(6) =17a(7) =25a(8) =31a(9) =88a(10) =95a(11) =137a(12) =141a(13) =416a(14) =610a(15) =781a(16) =800a(17) =2353a(18) =7291a(19) =9627a(20) =9749a(21) =15946a(22) =19215a(23) =48904