Numbers k such that 107*2^k+1 is prime.

Terms

a(0) =3a(1) =7a(2) =23a(3) =27a(4) =291a(5) =303a(6) =311a(7) =479a(8) =567a(9) =3087a(10) =18459a(11) =33575a(12) =43123a(13) =58291a(14) =155587a(15) =173007a(16) =414531a(17) =1220391a(18) =1337019a(19) =2081775a(20) =2401731