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 A030176 #26 Jul 16 2025 08:16:44
%S A030176 4,64,46656,56644,66564,544644,45454564,645566464,6465446464,
%T A030176 5654446456464,6444655544646544,445646655445456656,
%U A030176 45645446454646566544,46556646565455444544,566545664646454546564,6666455655446656664464,4566565465446655646456464,6464465564656456445556646564
%N A030176 Squares composed of digits {4,5,6}.
%H A030176 Zhao Hui Du, <a href="/A030176/b030176.txt">Table of n, a(n) for n = 1..24</a>
%H A030176 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 A030176 Hisanori Mishima, <a href="https://www.asahi-net.or.jp/~KC2H-MSM/mathland/math02/math0210.htm#456">Sporadic tridigital solutions</a>.
%H A030176 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/SquareNumber.html">Square Number</a>.
%H A030176 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 A030176 a(n) = A030177(n)^2. - _Elmo R. Oliveira_, Jul 16 2025
%Y A030176 Cf. A030177.
%K A030176 nonn,base
%O A030176 1,1
%A A030176 _Patrick De Geest_
%E A030176 More terms from C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 14 2005