Numbers k such that 67*2^k+1 is prime.

Terms

a(0) =2a(1) =6a(2) =14a(3) =20a(4) =44a(5) =66a(6) =74a(7) =102a(8) =134a(9) =214a(10) =236a(11) =238a(12) =342a(13) =354a(14) =382a(15) =454a(16) =470a(17) =598a(18) =726a(19) =870a(20) =1148a(21) =1366a(22) =1692a(23) =1782a(24) =1870a(25) =3602a(26) =6574a(27) =9362a(28) =12366a(29) =20774