%I #15 Dec 25 2019 15:31:34
%S 2,3,5,7,8,10,12,13,15,17,18,20,22,23
%N Nonsquares mod 25.
%t Complement[Range[0, 24], PowerMod[Range[0, 24], 2, 25]] (* _Alonso del Arte_, Nov 25 2019 *)
%o (Scala) val squaresMod25 = (0 to 24).map(n => n * n).map(_ % 25)
%o (0 to 24).diff(squaresMod25) // _Alonso del Arte_, Nov 25 2019
%Y Cf. A010387.
%K nonn,fini,full,easy
%O 1,1
%A _N. J. A. Sloane_