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 A053897 #17 Jul 18 2025 14:06:01
%S A053897 1,4,144,441,1444,115111441,1551414544,441411414544,115414455444544,
%T A053897 41155551514151451441,114515541511151545444,5115115541555411411554441,
%U A053897 5411144145154411455544144144
%N A053897 Squares composed of digits {1,4,5}.
%H A053897 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 A053897 Hisanori Mishima, <a href="https://www.asahi-net.or.jp/~KC2H-MSM/mathland/math02/math0210.htm#145">Sporadic tridigital solutions</a>.
%H A053897 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 A053897 a(n) = A053896(n)^2. - _Elmo R. Oliveira_, Jul 18 2025
%Y A053897 Cf. A053896.
%K A053897 nonn,base,more
%O A053897 1,2
%A A053897 _Patrick De Geest_, Mar 15 2000
%E A053897 More terms from C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 04 2005
%E A053897 Two more terms from _Jon E. Schoenfield_, Sep 03 2006