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Numbers k such that k^2 contains only digits {3,4,8}.
1

%I #16 Aug 11 2024 14:41:32

%S 2,22,62,939938,290427872,620035792022,291278798292022,

%T 665949276513522,6952948212333013522,5906300402396058566810062

%N Numbers k such that k^2 contains only digits {3,4,8}.

%H Author?, <a href="http://web.archive.org/web/20080708203024/http://blue.kakiko.com/mmrmmr/htm/eqtn06.html">Source</a>(<a href="http://web.archive.org/web/20060426155831/http://blue.kakiko.com/mmrmmr/txt/eqtn06.txt">txt</a>)

%H P. De Geest, <a href="https://www.worldofnumbers.com/threedigits.htm">Squares containing at most three distinct digits, Index entries for related sequences</a>

%H Hisanori Mishima, <a href="http://www.asahi-net.or.jp/~KC2H-MSM/mathland/math02/math0210.htm">Sporadic tridigital solutions</a> [From _Max Alekseyev_, Sep 19 2009]

%Y Cf. A053941.

%K nonn,base,more

%O 1,1

%A _Patrick De Geest_, Mar 15 2000

%E More terms from C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 04 2005

%E Four more terms from Mishima's page added by _Max Alekseyev_, Sep 19 2009