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 A129397 #11 Oct 07 2015 08:36:40 %S A129397 1,9,-29,61,-17,-263,1019,-2027,1639,4625,-22989,52717,-62369,-43863, %T A129397 426475,-1159355,1757143,-366911,-6668509,22627357,-41707313,31494233, %U A129397 83699163,-398658443,880521031,-1018619535,-628523501,6333704269,-16958792897,25462262281,-6426619957,-88626976859 %N A129397 Row sums of A129396. %F A129397 Empirical g.f.: (x+1)*(8*x^4-6*x^3+x^2+12*x+1) / ((x-1)^2*(4*x^2+3*x+1)^2). - _Colin Barker_, Oct 07 2015 %Y A129397 Cf. A129396. %K A129397 sign %O A129397 0,2 %A A129397 _Jonas Wallgren_, Apr 13 2007 %E A129397 Corrected and extended by _R. J. Mathar_, Apr 30 2007