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 A053905 #16 Jul 20 2025 10:37:56
%S A053905 1,81,11881,88118818815155881,18851515118581858155155881,
%T A053905 11555185818155188818511188881585888881,
%U A053905 5818888111118115811551585855811558551185881
%N A053905 Squares composed of digits {1,5,8}.
%H A053905 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 A053905 Hisanori Mishima <a href="https://www.asahi-net.or.jp/~KC2H-MSM/mathland/math02/math0210.htm">Squares consisted of 3 different digits</a>.
%F A053905 a(n) = A053904(n)^2. - _Elmo R. Oliveira_, Jul 18 2025
%Y A053905 Cf. A053904.
%K A053905 nonn,base,more
%O A053905 1,2
%A A053905 _Patrick De Geest_, Mar 15 2000
%E A053905 a(5) from _Jon E. Schoenfield_, Sep 03 2006
%E A053905 a(6)-a(7) from Mishima's webpage added by _Max Alekseyev_, May 21 2009