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

Terms

a(0) =1a(1) =2a(2) =4a(3) =5a(4) =6a(5) =10a(6) =14a(7) =16a(8) =25a(9) =50a(10) =54a(11) =66a(12) =76a(13) =109a(14) =124a(15) =129a(16) =154a(17) =201a(18) =210a(19) =225a(20) =324a(21) =844a(22) =1444a(23) =2529a(24) =3029a(25) =3292a(26) =3340a(27) =9162a(28) =44721a(29) =45662