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 A292869 #4 Sep 25 2017 13:08:38
%S A292869 1,-1,0,0,1,-1,0,1,0,-1,-1,2,-1,-1,1,3,-2,-2,2,1,-5,-1,7,1,-5,2,7,-9,
%T A292869 -10,6,10,-10,2,22,2,-29,-6,18,-19,-22,39,52,-30,-27,32,-19,-108,-2,
%U A292869 125,29,-43,101,90,-215,-231,83,89,-126,186,522,28,-523,-167,18,-598,-336,1042,1134,-165,-132,401
%N A292869 Expansion of 1/(1 + x + x^2 + x^3/(1 + x^4 + x^5 + x^6/(1 + x^7 + x^8 + x^9/(1 + ...)))), a continued fraction.
%t A292869 nmax = 70; CoefficientList[Series[1/(1 + x + x^2 + ContinuedFractionK[x^(3 k - 3), 1 + x^(3 k - 2) + x^(3 k - 1), {k, 2, nmax}]), {x, 0, nmax}], x]
%Y A292869 Cf. A088353, A092869.
%K A292869 sign
%O A292869 0,12
%A A292869 _Ilya Gutkovskiy_, Sep 25 2017