%I #7 Mar 31 2012 14:02:20
%S 2,31,73,87,117,283,313,319,375,379,395,415,419,433,445,471,477,499,
%T 505,515,535,587,613,665,769,841,929
%N Nonprimitive irreducible polynomials over GF(2).
%H A. Karttunen, <a href="/A091247/a091247.scm.txt">Scheme-program for computing this sequence.</a>
%H <a href="/index/Ge#GF2X">Index entries for sequences operating on GF(2)[X]-polynomials</a>
%Y a(n) = A014580(A091251(n)). Cf. A091250. In binary format: A091253.
%K nonn
%O 1,1
%A _Antti Karttunen_, Jan 03 2004