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 A048353 #20 Mar 06 2025 10:53:44
%S A048353 9,83,298,1378,8878,29641,298141,623609,9321378,28072917,94121667,
%T A048353 329877083,4341484641,29478276559,62360956378,151284113141,
%U A048353 3436394751609,9428037062872,22065558748622,29770520349641,942808510191167,9427024391927083,22335822988837615,94270265131105359,298125621993127083
%N A048353 a(n)^2 is the smallest square containing exactly n 8's.
%H A048353 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/SquareNumber.html">Square Number</a>
%t A048353 a[n_] := Module[{i = 1}, While[DigitCount[i^2][[8]] != n, i++ ]; i]; (* Sam Handler (sam_5_5_5_0(AT)yahoo.com), Aug 22 2006 *)
%Y A048353 Cf. A036515, A034992.
%K A048353 nonn,base
%O A048353 1,1
%A A048353 _Patrick De Geest_, Mar 15 1999
%E A048353 a(13)-a(16) from _Jon E. Schoenfield_, Jan 24 2009
%E A048353 a(17)-a(20) from _Giovanni Resta_, Jul 27 2018
%E A048353 a(21)-a(25) from _Max Alekseyev_, Mar 06 2025