Numbers k such that x^k + x^3 + 1 is irreducible over GF(2).

Terms

a(0) =1a(1) =2a(2) =4a(3) =5a(4) =6a(5) =7a(6) =10a(7) =12a(8) =17a(9) =18a(10) =20a(11) =25a(12) =28a(13) =31a(14) =41a(15) =52a(16) =66a(17) =130a(18) =151a(19) =180a(20) =196a(21) =503a(22) =650a(23) =761a(24) =986a(25) =1391a(26) =1596a(27) =2047a(28) =2700a(29) =4098