%I A058439
%S A058439 2,88,638,2010988315424552
%N A058439 Numbers n such that n^2 contains only digits {0,4,7}, not ending with 
               zero.
%H A058439 P. De Geest, <a href="http://www.worldofnumbers.com/threedigits.htm">
               Index to related sequences</a>
%H A058439 Hisanori Mishima, <a href="http://www.asahi-net.or.jp/~KC2H-MSM/mathland/
               math02/math0210.htm#047">Sporadic tridigital solutions</a>
%Y A058439 Cf. A058440.
%Y A058439 Sequence in context: A041881 A076542 A066226 this_sequence A058463 A166848 
               A001904
%Y A058439 Adjacent sequences: A058436 A058437 A058438 this_sequence A058440 A058441 
               A058442
%K A058439 nonn,base,hard,more
%O A058439 1,1
%A A058439 Patrick De Geest (pdg(AT)worldofnumbers.com), Nov 15 2000.