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 A058416 #6 Aug 11 2024 14:41:33
%S A058416 1,5550101001,15500001001,115501010001005110501011001,
%T A058416 555115055501101055005101001,550015110551505101015151115110001
%N A058416 Squares composed of digits {0,1,5}, not ending with zero.
%H A058416 P. De Geest, <a href="https://www.worldofnumbers.com/threedigits.htm">Index to related sequences</a>
%H A058416 Hisanori Mishima, <a href="http://www.asahi-net.or.jp/~KC2H-MSM/mathland/math02/math0210.htm">Sporadic tridigital solutions</a>
%Y A058416 Cf. A058415.
%K A058416 nonn,base,more
%O A058416 1,2
%A A058416 _Patrick De Geest_, Nov 15 2000