This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A058436 #13 Aug 11 2024 14:41:33
%S A058436 4,50450550544,54504505444,54405405504004,444054555050404,
%T A058436 500450545045504,54555005040040544004,540455444500454505055504,
%U A058436 444455454500400455000455440400550454544,4050045045555405040055544045540445005444,44555404454444540454555540045000554555545444,450044404000444005405445044455050544404404054540004
%N A058436 Squares composed of digits {0,4,5}, not ending with zero.
%H A058436 P. De Geest, <a href="https://www.worldofnumbers.com/threedigits.htm">Index to related sequences</a>
%H A058436 Hisanori Mishima, <a href="http://www.asahi-net.or.jp/~KC2H-MSM/mathland/math02/math0210.htm#045">Sporadic tridigital solutions</a>
%F A058436 a(n) = A058435(n)^2.
%Y A058436 Cf. A058435.
%K A058436 nonn,base
%O A058436 1,1
%A A058436 _Patrick De Geest_, Nov 15 2000
%E A058436 Three more terms from Mishima's webpage added by _Max Alekseyev_, Jan 28 2012
%E A058436 a(12) from _Zhao Hui Du_, Feb 29 2024