Numbers n such that 25*2^n-1 is prime.

Terms

a(0) =3a(1) =9a(2) =11a(3) =17a(4) =23a(5) =35a(6) =39a(7) =75a(8) =105a(9) =107a(10) =155a(11) =161a(12) =215a(13) =225a(14) =335a(15) =635a(16) =651a(17) =687a(18) =1479a(19) =1515a(20) =1953a(21) =2435a(22) =2963a(23) =3671a(24) =5979a(25) =7551a(26) =8091a(27) =9791a(28) =15015a(29) =20897