Numbers k such that 2^k + prime(k) is prime.

Terms

a(0) =2a(1) =3a(2) =4a(3) =5a(4) =12a(5) =13a(6) =14a(7) =23a(8) =57a(9) =106a(10) =226a(11) =227a(12) =311a(13) =373a(14) =1046a(15) =1298a(16) =1787a(17) =1952a(18) =2130a(19) =2285a(20) =2670a(21) =3254a(22) =3642a(23) =4369a(24) =13559a(25) =33418a(26) =66830a(27) =213810