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%I #12 Apr 19 2019 12:15:09
%S 0,4,400,484,40000,40804,48400,88804,4000000,4008004,4080400,4088484,
%T 4840000,4848804,8880400,400000000,400080004,400800400,400880484,
%U 408040000,408848400,484000000,484088004,484880400,840884004,888040000,40000000000,40000800004
%N Squares containing only the digits 0, 4 or 8.
%F a(n)=A202170(n)^2
%t Select[Range[0, 400000]^2, Complement[Union[IntegerDigits[#]], {0, 4, 8}] == {} &] (* _T. D. Noe_, Dec 21 2011 *)
%t Select[FromDigits/@Tuples[{0,4,8},11],IntegerQ[Sqrt[#]]&] (* _Harvey P. Dale_, Apr 19 2019 *)
%o (PARI) for(i=0,99999,setminus(Set(Vec(Str(i^2))),Vec("048")) | print1(i^2,","))
%Y Cf. A030098.
%K nonn,base
%O 1,2
%A _M. F. Hasler_, Dec 13 2011