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 A053959 #17 Jul 16 2025 17:53:13
%S A053959 4,64,484,8464,68644,8868484,66686864644,648446888644,84488488664644,
%T A053959 6688684484846884,484468468684686864,6486486884468464644,
%U A053959 8666684686666444646464,6868846444484868668464644,686666466846666884868486448488884846884
%N A053959 Squares composed of digits {4,6,8}.
%H A053959 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 A053959 Hisanori Mishima, <a href="https://www.asahi-net.or.jp/~KC2H-MSM/mathland/math02/math0210.htm#468">Sporadic tridigital solutions</a>.
%H A053959 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 A053959 a(n) = A053958(n)^2. - _Elmo R. Oliveira_, Jul 16 2025
%Y A053959 Cf. A053958.
%K A053959 nonn,base,hard,more
%O A053959 1,1
%A A053959 _Patrick De Geest_, Mar 15 2000
%E A053959 More terms from C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 03 2005
%E A053959 One more term from _Jon E. Schoenfield_, Sep 04 2006
%E A053959 a(15) from Mishima's website added by _Elmo R. Oliveira_, Jul 16 2025