A053917 - OEIS

%I #16 Jul 19 2025 10:13:06

%S 4,324,232324,34433424,434222244,43342243344,242223434244,

%T 43323224233444,4222343433322242244,42223424423443333243223342224

%N Squares composed of digits {2,3,4}.

%H Patrick 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="https://www.asahi-net.or.jp/~KC2H-MSM/mathland/math02/math0210.htm#234">Sporadic tridigital solutions</a>. [From _Max Alekseyev_, Feb 06 2010]

%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>)

%F a(n) = A053916(n)^2. - _Elmo R. Oliveira_, Jul 18 2025

%Y Cf. A053916.

%K nonn,base,more

%O 1,1

%A _Patrick De Geest_, Mar 15 2000

%E a(9) from C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 04 2005

%E a(10) from Mishima's page added by _Max Alekseyev_, Feb 06 2010