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 A021067 #13 Jul 08 2025 08:00:02 %S A021067 0,1,5,8,7,3,0,1,5,8,7,3,0,1,5,8,7,3,0,1,5,8,7,3,0,1,5,8,7,3,0,1,5,8, %T A021067 7,3,0,1,5,8,7,3,0,1,5,8,7,3,0,1,5,8,7,3,0,1,5,8,7,3,0,1,5,8,7,3,0,1, %U A021067 5,8,7,3,0,1,5,8,7,3,0,1,5,8,7,3,0,1,5,8,7,3,0,1,5,8,7,3,0,1,5 %N A021067 Decimal expansion of 1/63. %H A021067 <a href="/index/Rec#order_03">Index entries for linear recurrences with constant coefficients</a>, signature (2, -2, 1). %F A021067 From _Chai Wah Wu_, Jun 07 2016: (Start) %F A021067 a(n) = 2*a(n-1) - 2*a(n-2) + a(n-3) for n > 2. %F A021067 G.f.: x*(1 + 3*x)/((1 - x)*(1 - x + x^2)). (End) %e A021067 0.0158730158730158730158730158... %K A021067 nonn,cons %O A021067 0,3 %A A021067 _N. J. A. Sloane_