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 A052099 #16 Aug 11 2024 14:41:32 %S A052099 1,7744,100220121,1001481404808481,1000049919014961464966416, %T A052099 100000011325773371773233151572525225, %U A052099 1000000011111863263563888125532588566228326235536 %N A052099 Smallest nonzero square with n distinct digits each occurring exactly n times. %C A052099 Obviously can contain at most 10 terms. %H A052099 P. De Geest, <a href="https://www.worldofnumbers.com/samedigits.htm">Numbers whose digits occur with same frequency</a> %Y A052099 Cf. A052093-A052098. %Y A052099 Cf. A052070. - _R. J. Mathar_, Oct 14 2008 %K A052099 nonn,base,fini,more %O A052099 1,2 %A A052099 _Patrick De Geest_, Jan 15 2000 %E A052099 a(5) from _Jon E. Schoenfield_, Jul 17 2010 %E A052099 Offset corrected and a(6)-a(7) from _Donovan Johnson_, Apr 16 2011