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%I #6 Oct 18 2019 22:16:47
%S 3,8819172285373497
%N Numbers k such that k^2 contains only digits {0,7,9}, not ending with zero.
%H P. De Geest, <a href="http://www.worldofnumbers.com/threedigits.htm">Index to related sequences</a>
%H Hisanori Mishima, <a href="http://www.asahi-net.or.jp/~KC2H-MSM/mathland/math02/math0210.htm#079">Sporadic tridigital solutions</a>
%Y Cf. A058454.
%K nonn,base,hard,more,bref
%O 1,1
%A _Patrick De Geest_, Nov 15 2000
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