Numbers k such that 5^k mod 2^k is prime.

Terms

a(0) =3a(1) =10a(2) =19a(3) =24a(4) =28a(5) =61a(6) =79a(7) =96a(8) =104a(9) =125a(10) =132a(11) =191a(12) =196a(13) =243a(14) =292a(15) =302a(16) =462a(17) =466a(18) =586a(19) =621a(20) =1508a(21) =3307a(22) =3823a(23) =4729a(24) =5370a(25) =6721a(26) =8110a(27) =11145a(28) =13502a(29) =13762