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 A291679 #6 Aug 30 2017 09:36:38 %S A291679 1,1,1,-2,-11,-24,-8,141,573,1087,-174,-8700,-31328,-52740,36387, %T A291679 534198,1742445,2540583,-3626189,-33115232,-97968686,-118497822, %U A291679 301668764,2060526393,5526622320,5165256226,-23033840842,-127995025736,-310560935969,-193716799472 %N A291679 Main diagonal of A291678. %F A291679 a(n) = [x^n] (1 + x/(1 + x^2/(1 + x^3/(1 + x^4/(1 + x^5/(1 + ...))))))^n, a continued fraction. %Y A291679 Cf. A291651, A291678. %K A291679 sign %O A291679 0,4 %A A291679 _Seiichi Manyama_, Aug 29 2017