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 A291702 #6 Aug 30 2017 09:36:54 %S A291702 1,-1,1,-4,13,-36,100,-281,797,-2281,6546,-18778,53872,-154662,444263, %T A291702 -1276284,3665773,-10524939,30203731,-86624174,248257298,-710882708, %U A291702 2033663952,-5811660425,16588828304,-47291077636,134630218334,-382697080366,1086083438999 %N A291702 Main diagonal of A291701. %F A291702 a(n) = [x^n] (1 - x/(1 - x^2/(1 - x^3/(1 - x^4/(1 - x^5/(1 - ...))))))^n, a continued fraction. %Y A291702 Cf. A291701. %K A291702 sign %O A291702 0,4 %A A291702 _Seiichi Manyama_, Aug 30 2017