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 A053892 #19 Mar 09 2024 09:21:31
%S A053892 1,4,6,19,56,369,796,1146,1156,3656,8131,19056,40204,81619,258131,
%T A053892 5624381,24762131,362789631,1079982019,11666754546,562726517354,
%U A053892 3337114272296,5624644998854,18266544874814631,11537606482136410218512760694
%N A053892 Numbers k such that k^2 contains only digits {1,3,6}.
%H A053892 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 A053892 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_, May 30 2009]
%Y A053892 Cf. A053893.
%K A053892 nonn,base,more
%O A053892 1,2
%A A053892 _Patrick De Geest_, Mar 15 2000
%E A053892 More terms from C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 04 2005
%E A053892 Two more terms from _Jon E. Schoenfield_, Sep 03 2006
%E A053892 One more term from Mishima's webpage added by _Max Alekseyev_, May 30 2009
%E A053892 a(25) from _Zhao Hui Du_, Mar 09 2024