Numbers k such that x^k + x^6 + 1 is irreducible over GF(2).

Terms

a(0) =1a(1) =3a(2) =5a(3) =7a(4) =17a(5) =31a(6) =71a(7) =97a(8) =167a(9) =175a(10) =209a(11) =385a(12) =2159a(13) =5617a(14) =8921a(15) =33425a(16) =39119a(17) =76625a(18) =110249a(19) =192127a(20) =255265