%I #27 Mar 10 2024 10:51:07

%S 9,25,225,529,5929,29929,55225,99225,2295225,5929225,52229529,

%T 552955225,2952292225,9559559529,59299555225,5929599995929,

%U 9552259592929,5255925929995225,5555255292952225,92922592295555529529

%N Squares composed of digits {2,5,9}.

%C a(n) == 5 or 9 (mod 10). - _Chai Wah Wu_, Nov 30 2018

%H Zhao Hui Du, <a href="/A053929/b053929.txt">Table of n, a(n) for n = 1..26</a>

%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 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>)

%t Flatten[Table[Select[FromDigits /@ Tuples[{2, 5, 9}, n], IntegerQ[Sqrt[#]] &], {n, 6}]] (* _Amiram Eldar_, Nov 30 2018 *)

%Y Cf. A053928.

%K nonn,base

%O 1,1

%A _Patrick De Geest_, Mar 15 2000

%E One more term from C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 14 2005