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 A030486 #11 Mar 09 2024 19:16:28
%S A030486 5,15,16,25,75,235,475,515,516,725,5125,7525,22925,23585,72475,505525,
%T A030486 515415,2501125,15008516,23711235,72267325,149081275,250133275,
%U A030486 256032335,505228925,2294919525,5153315075,15040686675,50222133125
%N A030486 When squared gives number composed of digits {2,5,6}.
%H A030486 Zhao Hui Du, <a href="/A030486/b030486.txt">Table of n, a(n) for n = 1..44</a>
%H A030486 Patrick De Geest, <a href="http://www.worldofnumbers.com/threedigits.htm">Squares containing at most three distinct digits, Index entries for related sequences</a>
%H A030486 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>)
%Y A030486 Cf. A030484.
%K A030486 nonn,base
%O A030486 1,1
%A A030486 _Patrick De Geest_
%E A030486 Extended and corrected by author 03/2000.
%E A030486 More terms from C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 03 2005