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 A053962 #14 Mar 09 2024 20:57:34
%S A053962 2,22,28,88,86478,94227622,9208064263934568938,22019193553462506122,
%T A053962 6984617991328143315228383028
%N A053962 Numbers k such that k^2 contains only digits {4,7,8}.
%H A053962 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 A053962 H. Mishima <a href="http://www.asahi-net.or.jp/~KC2H-MSM/mathland/math02/math0210.htm">Squares consisted of 3 different digits</a> [From _Max Alekseyev_, Mar 10 2009]
%Y A053962 Cf. A053963.
%K A053962 nonn,base,more
%O A053962 1,1
%A A053962 _Patrick De Geest_, Mar 15 2000
%E A053962 Two more terms from Mishima's page added by _Max Alekseyev_, Mar 10 2009
%E A053962 a(9) from _Zhao Hui Du_, Mar 09 2024