Numbers k such that 2^k + 23 is prime.

Terms

a(0) =3a(1) =7a(2) =39a(3) =79a(4) =359a(5) =451a(6) =1031a(7) =1039a(8) =11311a(9) =30227a(10) =47599a(11) =55731a(12) =307099a(13) =351831a(14) =418851