Numbers n such that 257*2^n-1 is prime.

Terms

a(0) =4a(1) =6a(2) =10a(3) =16a(4) =24a(5) =60a(6) =66a(7) =82a(8) =184a(9) =256a(10) =324a(11) =424a(12) =632a(13) =756a(14) =814a(15) =872a(16) =1114a(17) =1702a(18) =3282a(19) =3420a(20) =3862a(21) =3864a(22) =4162a(23) =4510a(24) =7030a(25) =8410a(26) =47974a(27) =59236a(28) =61084a(29) =78034