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 A027085 #26 Jun 24 2020 12:41:17
%S A027085 5,16,39,84,169,328,623,1168,2173,4024,7431,13700,25233,46448,85471,
%T A027085 157248,289269,532096,978727,1800212,3311161,6090232,11201743,
%U A027085 20603280,37895405,69700584,128199431,235795588,433695777,797690976
%N A027085 a(n) = A027082(n, n+3).
%H A027085 <a href="/index/Rec#order_05">Index entries for linear recurrences with constant coefficients</a>, signature (3,-2,0,-1,1).
%F A027085 G.f.: (x^3-x^2-x-5)/((x-1)^2(x^3+x^2+x-1)). - _Harvey P. Dale_, May 15 2013
%F A027085 a(n) = A027025(n) + n + 1.
%F A027085 a(n) = A000213(n+6) -3*(n+4). - _R. J. Mathar_, Jun 24 2020
%t A027085 CoefficientList[Series[-((-x^3+x^2+x+5)/((x-1)^2 (x^3+x^2+x-1))),{x,0,30}],x] (* _Harvey P. Dale_, May 15 2013 *)
%Y A027085 Cf. A027025, A027082.
%K A027085 nonn,easy
%O A027085 0,1
%A A027085 _Clark Kimberling_