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Squares composed of digits {3,4,6}.
2

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

%S 4,36,64,3364,4443664,443433464464,466363336464,43346343434436,

%T 46443434463364,3436643466443664,33663346434644644,

%U 6344433646663343363344,444336446434444344644644,4333643333666334466333636,4464644636363464333646646666664464,44444633333463334436443663666646446336

%N Squares composed of digits {3,4,6}.

%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#346">Sporadic tridigital solutions</a>

%F a(n) = A053938(n)^2.

%Y Cf. A053938.

%K nonn,base

%O 1,1

%A _Patrick De Geest_, Mar 15 2000

%E More terms from C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 03 2005

%E a(14)-a(16) from Mishima's website, added by _Max Alekseyev_, Nov 30 2017