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 A291875 #8 Sep 06 2017 04:08:27 %S A291875 1,-1,-1,-1,-2,-3,-6,-10,-19,-34,-63,-115,-213,-391,-723,-1333,-2463, %T A291875 -4547,-8403,-15522,-28686,-53006,-97963,-181042,-334606,-618415, %U A291875 -1142994,-2112545,-3904592,-7216810,-13338856,-24654268,-45568784,-84225393,-155675230 %N A291875 Expansion of 1 - x/(1 - x/(1 - x^2/(1 - x^2/(1 - x^3/(1 - x^3/(1 - x^4/(1 - x^4/ ...))))))), a continued fraction. %F A291875 a(n) = -A227309(n-1) for n > 0. %Y A291875 Cf. A006958, A227309, A291148 (similar sequence). %K A291875 sign %O A291875 0,5 %A A291875 _Seiichi Manyama_, Sep 04 2017