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 A119273 #24 Apr 24 2022 11:44:39
%S A119273 1,17,232,540,2520,27702,59869,82657,2947885,5851737,37568808,
%T A119273 297970002,478867545,5721476626,29961646177,65107456694,570931518444,
%U A119273 2997997000002,9607464857096,53858918990529,299956723113202,1253472906066265,2171966135005184
%N A119273 Absolute value of the difference between largest square and largest cube each with n decimal digits.
%C A119273 a(n) = |A061433(n) - A061435(n)|, where A061433 and A061435 are the largest n-digit square and cube.
%H A119273 Harvey P. Dale, <a href="/A119273/b119273.txt">Table of n, a(n) for n = 1..90</a>
%F A119273 a(n) = (ceiling(10^(n/2)) - 1)^2 - (ceiling(10^(n/3)) - 1)^3.
%t A119273 Table[Abs[Floor[Sqrt[10^n-1]]^2-Floor[Surd[10^n-1,3]]^3],{n,30}] (* _Harvey P. Dale_, Apr 24 2022 *)
%Y A119273 Cf. A061433, A061435.
%K A119273 base,nonn
%O A119273 1,2
%A A119273 _Zak Seidov_, May 12 2006
%E A119273 Corrected, extended, and definition clarified by _Harvey P. Dale_, Apr 24 2022