%I #14 Mar 09 2024 20:57:34
%S 2,22,28,88,86478,94227622,9208064263934568938,22019193553462506122,
%T 6984617991328143315228383028
%N Numbers k such that k^2 contains only digits {4,7,8}.
%H Patrick De Geest, <a href="http://www.worldofnumbers.com/threedigits.htm">Squares containing at most three distinct digits, Index entries for related sequences</a>
%H H. Mishima <a href="http://www.asahi-net.or.jp/~KC2H-MSM/mathland/math02/math0210.htm">Squares consisted of 3 different digits</a> [From _Max Alekseyev_, Mar 10 2009]
%Y Cf. A053963.
%K nonn,base,more
%O 1,1
%A _Patrick De Geest_, Mar 15 2000
%E Two more terms from Mishima's page added by _Max Alekseyev_, Mar 10 2009
%E a(9) from _Zhao Hui Du_, Mar 09 2024
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