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 A052069 #18 Oct 12 2019 20:26:46
%S A052069 0,88,10011,31646191,16431563,667567716,10715008859,652246443112,
%T A052069 15647628653832,781035313645040
%N A052069 a(n)^2 is the smallest square whose digits occur with the same frequency n.
%H A052069 Patrick De Geest, <a href="http://www.worldofnumbers.com/samedigits.htm">Numbers whose digits occur with same frequency</a>
%e A052069 31646191^2 = 1001481404808481 and its digits 0, 1, 4 and 8 each occur four times.
%t A052069 Table[i = 0;
%t A052069 While[x = i^2; Union@DeleteCases[DigitCount[x], 0] != {n}, i++];
%t A052069 i, {n, 10}] (* _Robert Price_, Oct 12 2019 *)
%Y A052069 Cf. A052070, A045540, A052046, A052049, A052050, A052071.
%K A052069 nonn,base,more,nice
%O A052069 1,2
%A A052069 _Patrick De Geest_, Jan 15 2000
%E A052069 2 more terms from _Jon E. Schoenfield_, Aug 18 2007
%E A052069 a(10) from _Giovanni Resta_, Aug 19 2018