Numbers k such that 253*2^k+1 is prime.

Terms

a(0) =2a(1) =4a(2) =6a(3) =16a(4) =32a(5) =48a(6) =50a(7) =52a(8) =64a(9) =66a(10) =72a(11) =86a(12) =108a(13) =130a(14) =164a(15) =304a(16) =356a(17) =482a(18) =486a(19) =712a(20) =772a(21) =834a(22) =1196a(23) =1508a(24) =1552a(25) =1600a(26) =1754a(27) =1858a(28) =2228a(29) =3562