%I #10 Apr 17 2020 07:49:26
%S 2,4,8,40,44,56,64,148,200,320,328,400,1280
%N Numbers n such that x^n + x^3 + 2 is irreducible over GF(3).
%o (PARI) is(k) = polisirreducible(Mod(1, 3)*(x^k + x^3 + 2)); \\ _Jinyuan Wang_, Apr 15 2020
%Y Cf. A057461.
%K nonn,more
%O 1,1
%A _Robert G. Wilson v_, Dec 01 2000
%E a(13) from _Jinyuan Wang_, Apr 15 2020