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 A066558 #10 Dec 06 2024 20:20:22
%S A066558 9,49,333,2499,19999,166666,1428571,12499999,111111111,999999999,
%T A066558 9090909090,83333333333,769230769230,7142857142857,66666666666666,
%U A066558 624999999999999,5882352941176470,55555555555555555,526315789473684210,4999999999999999999,47619047619047619047
%N A066558 a(n) = A066557(n)/n.
%H A066558 Harry J. Smith, <a href="/A066558/b066558.txt">Table of n, a(n) for n = 1..150</a>
%F A066558 a(n) = floor((10^n-1)/n).
%o A066558 (PARI) a(n) = { (10^n - 1)\n } \\ _Harry J. Smith_, Feb 22 2010
%Y A066558 Cf. A053041, A066557.
%K A066558 nonn,base
%O A066558 1,1
%A A066558 _Amarnath Murthy_, Dec 17 2001
%E A066558 More terms and formula from Francisco Salinas (franciscodesalinas(AT)hotmail.com), Dec 24 2001