Numbers k such that 3^k - 28 is prime.

Terms

a(0) =4a(1) =6a(2) =10a(3) =15a(4) =22a(5) =24a(6) =27a(7) =35a(8) =63a(9) =91a(10) =95a(11) =96a(12) =124a(13) =132a(14) =220a(15) =280a(16) =338a(17) =372a(18) =432a(19) =568a(20) =692a(21) =738a(22) =1144a(23) =1168a(24) =1698a(25) =2080a(26) =2138a(27) =2710a(28) =2895a(29) =2984