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 A137470 #14 Dec 24 2015 18:50:09 %S A137470 1,1,-1,3,-1,-1,7,-9,7,7,-25,39,-25,-25,103,-153,103,103,-409,615, %T A137470 -409,-409,1639,-2457,1639,1639,-6553,9831,-6553,-6553,26215,-39321, %U A137470 26215,26215,-104857,157287,-104857,-104857,419431 %N A137470 Inverse binomial transform of 1, 2, 2, 4, 10, 20, ... = A100088. %H A137470 <a href="/index/Rec">Index entries for linear recurrences with constant coefficients</a>, signature (-1,0,2) %F A137470 a(n)=[3+(1-2i)(i-1)^n+(1+2i)(-1-i)^n]/5 where i=sqrt(-1). - _R. J. Mathar_, Apr 25 2008 %F A137470 O.g.f.: -(1+2x)/((1+2x+2x^2)(-1+x)). - _R. J. Mathar_, Apr 25 2008 %F A137470 a(n+1)-a(n)=A090132(n+1). - _R. J. Mathar_, Apr 25 2008 %F A137470 G.f.: Q(0)*(1+2*x)/(2- 2*x), where Q(k) = 1 + 1/(1 - x*(4*k+2 +2*x)/(x*(4*k+4 +2*x) - 1/Q(k+1) )); (continued fraction). - _Sergei N. Gladkovskii_, Jan 01 2014 %K A137470 sign,easy %O A137470 0,4 %A A137470 _Paul Curtz_, Apr 20 2008 %E A137470 More terms from _R. J. Mathar_, Apr 25 2008