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 A141352 #8 Jun 13 2015 00:52:38
%S A141352 1,-1,-6,-11,-15,-25,-35,-41,-56,-71,-79,-99,-119,-129,-154,-179,-191,
%T A141352 -221,-251,-265,-300,-335,-351,-391,-431,-449,-494,-539,-559,-609,
%U A141352 -659,-681,-736,-791,-815,-875,-935,-961,-1026,-1091,-1119
%N A141352 Expansion of (1-2x-5x^2-7x^3+x^6)/((1-x)(1-x^3)^2).
%C A141352 Hankel transform of A141351.
%H A141352 <a href="/index/Rec#order_07">Index entries for linear recurrences with constant coefficients</a>, signature (1,0,2,-2,0,-1,1).
%F A141352 G.f.: (1-2x-5x^2-7x^3+x^6)/(1-x-2x^3+2x^4+x^6-x^7);
%t A141352 CoefficientList[Series[(1-2x-5x^2-7x^3+x^6)/ ((1-x)(1-x^3)^2), {x,0,50}],x] (* _Harvey P. Dale_, Mar 31 2011 *)
%K A141352 easy,sign
%O A141352 0,3
%A A141352 _Paul Barry_, Jun 27 2008