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 A141571 #14 Jan 01 2024 08:33:38
%S A141571 1,2,0,1,1,0,1,1,0,1,1,0,1,1,0,1,1,0,1,1,0,1,1,0,1,1,0,1,1,0,1,1,0,1,
%T A141571 1,0,1,1,0,1,1,0,1,1,0,1,1,0,1,1,0,1,1,0,1,1,0,1,1,0,1,1,0,1,1,0,1,1,
%U A141571 0,1,1,0,1,1,0,1,1,0,1,1,0,1,1,0,1,1,0,1,1,0,1,1,0,1,1,0,1,1,0
%N A141571 Decimal expansion of 11999/99900.
%H A141571 <a href="/index/Rec#order_03">Index entries for linear recurrences with constant coefficients</a>, signature (0, 0, 1).
%F A141571 G.f.: (1+2*x-x^4)/(1-x^3). - _Jaume Oliver Lafont_, Mar 24 2009
%e A141571 .12011011011011011011011011011011011011011011011011011011011...
%t A141571 Join[{1, 2},LinearRecurrence[{0, 0, 1},{0, 1, 1},97]] (* _Ray Chandler_, Aug 25 2015 *)
%o A141571 (PARI) a(n)=(n%3!=2)+(n==1) \\ _Jaume Oliver Lafont_, Mar 24 2009
%Y A141571 Cf. A110044.
%K A141571 nonn,cons
%O A141571 0,2
%A A141571 _Eric Desbiaux_, Sep 13 2008