Numbers k such that 2^k - 19 is prime.

Terms

a(0) =5a(1) =7a(2) =11a(3) =15a(4) =19a(5) =21a(6) =31a(7) =39a(8) =67a(9) =69a(10) =85a(11) =157a(12) =171a(13) =191a(14) =255a(15) =291a(16) =379a(17) =3669a(18) =4551a(19) =9531a(20) =13119a(21) =14211a(22) =20647a(23) =233965a(24) =337267a(25) =534429a(26) =535415a(27) =816039a(28) =991715