%I A137310
%S A137310 1,3,7,9,13,15,25,37,43,45,49,67,73,79,87,93,97,105,115,127,135,139,153,
%T A137310 163,165,169,175,177,189,193,199,205,207,213,219,235,265,277,279,303,
%U A137310 307,309,319,325,343,345,363,373,387,405,409,417,423,433,435,465,469
%N A137310 Numbers n such that a type-4 Gaussian normal basis over GF(2^n) exists.
%C A137310 A type-t Gaussian normal basis exists for GF(2^n) if p=n*t+1 is prime 
               and gcd(n,(p-1)/ord(2 mod p))==1.
%Y A137310 Cf. A136415.
%Y A137310 Sequence in context: A024901 A000959 A120226 this_sequence A118567 A118561 
               A057701
%Y A137310 Adjacent sequences: A137307 A137308 A137309 this_sequence A137311 A137312 
               A137313
%K A137310 nonn
%O A137310 1,2
%A A137310 Joerg Arndt (arndt(AT)jjj.de), Apr 05 2008