A030174 - OEIS

%I #12 Aug 11 2024 14:41:30

%S 1,121,12321,1322122321,132233322321,213223221121,13223121322321,

%T 1212111311221321,131332121232312121,31121322221111133211321,

%U 3322133322121313132333322321,12232213113321121113332133323121

%N Squares composed of digits {1,2,3}.

%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">Sporadic tridigital solutions</a>

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/SquareNumber.html">Square Number.</a>

%Y Cf. A030175.

%K nonn,base

%O 1,2

%A _Patrick De Geest_

%E More terms from the author, Mar 15 2000.

%E More terms from C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 14 2005