%I #12 Apr 17 2020 07:49:50
%S 4,16,52,76,236,376,380,1064,1460,4600,5204
%N Numbers n such that x^n + x^9 + 2 is irreducible over GF(3).
%C All terms are even, as 2 is a root if n is odd. - _Robert Israel_, Dec 31 2015
%p select(n -> Irreduc(x^n + x^9 + 2) mod 3, 2*[$1..1000]); # _Robert Israel_, Dec 31 2015
%Y Cf. A057479.
%K nonn,more
%O 1,1
%A _Robert G. Wilson v_, Dec 01 2000
%E a(10) and a(11) from _Robert Israel_, Dec 31 2015