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%I #16 Aug 11 2024 14:41:32
%S 3,26,264,313,3114,3114113,278922387,881361264,2603208937,3125343176,
%T 312518799063,2770739969214,8366461419063,260723947264113,
%U 9831977256725526
%N Numbers k such that k^2 contains only digits {6,7,9}.
%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 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 Hisanori Mishima, <a href="http://www.asahi-net.or.jp/~KC2H-MSM/mathland/math02/math0210.htm#679">Sporadic tridigital solutions</a>
%Y Cf. A053973.
%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 14 2005
%E Two more terms from _Jon E. Schoenfield_, Sep 04 2006
%E a(14)-a(15) from Mishima's website, added by _Max Alekseyev_, Nov 30 2017