Numbers k such that 425*2^k+1 is prime.

Terms

a(0) =7a(1) =27a(2) =31a(3) =43a(4) =79a(5) =169a(6) =193a(7) =241a(8) =511a(9) =987a(10) =1273a(11) =1807a(12) =2671a(13) =3327a(14) =3409a(15) =8469a(16) =12691a(17) =16465a(18) =50595a(19) =62155a(20) =154323a(21) =336465a(22) =479187a(23) =524997a(24) =641553a(25) =1048563