Numbers k that divide 2^(2^k) - 2^k + 1.

Terms

a(0) =1a(1) =3a(2) =5a(3) =17a(4) =257a(5) =641a(6) =1605a(7) =4369a(8) =32113a(9) =65537a(10) =94945a(11) =114689a(12) =159441a(13) =164737a(14) =274177a(15) =319489a(16) =974849a(17) =2424833a(18) =3862465a(19) =6700417a(20) =13631489a(21) =13906833a(22) =16843009a(23) =26017793a(24) =42009217a(25) =45592577a(26) =63766529a(27) =70463489a(28) =167772161a(29) =175747457