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%I #2 Mar 30 2012 17:36:32
%S 1,3,7,9,13,15,25,37,43,45,49,67,73,79,87,93,97,105,115,127,135,139,
%T 153,163,165,169,175,177,189,193,199,205,207,213,219,235,265,277,279,
%U 303,307,309,319,325,343,345,363,373,387,405,409,417,423,433,435,465,469
%N Numbers n such that a type-4 Gaussian normal basis over GF(2^n) exists.
%C 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 Cf. A136415.
%K nonn
%O 1,2
%A _Joerg Arndt_, Apr 05 2008
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