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 A053886 #19 Mar 09 2024 07:42:30
%S A053886 1,9,11,91,109,359,3359,15109,33359,333359,3333359,14903989,15127091,
%T A053886 28497739,33333359,90450109,333333359,3333333359,33333333359,
%U A053886 46023126591,333333333359,1697404542909,3333333333359,33333333333359
%N A053886 Numbers k such that k^2 contains only digits {1,2,8}.
%H A053886 Zhao Hui Du, <a href="/A053886/b053886.txt">Table of n, a(n) for n = 1..44</a>
%H A053886 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 A053886 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 A053886 Cf. A053887.
%K A053886 nonn,base
%O A053886 1,2
%A A053886 _Patrick De Geest_, Mar 15 2000
%E A053886 More terms from C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 03 2005
%E A053886 Three more terms from _Jon E. Schoenfield_, Sep 03 2006