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 A291274 #31 Feb 16 2025 08:33:50
%S A291274 1,1,4,36,384,5125,81864,1519833,32219136,768352149,20367510000,
%T A291274 594270942705,18929706034176,653744865197242,24333393186194848,
%U A291274 971177936039212500,41376191798281502720,1874320475909920820607,89961819584112859211712,4560744533588836253021837
%N A291274 a(n) = [x^n] 1/(1 - n*x/(1 - n*x^2/(1 - n*x^3/(1 - n*x^4/(1 - n*x^5/(1 - ...)))))), a continued fraction.
%H A291274 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Rogers-RamanujanContinuedFraction.html">Rogers-Ramanujan Continued Fraction</a>
%F A291274 a(n) = A286933(n,n).
%F A291274 a(n) ~ exp(1) * n^n. - _Vaclav Kotesovec_, Aug 26 2017
%t A291274 Table[SeriesCoefficient[1/(1 + ContinuedFractionK[-n x^i, 1, {i, 1, n}]), {x, 0, n}], {n, 0, 19}]
%Y A291274 Main diagonal of A286933.
%K A291274 nonn
%O A291274 0,3
%A A291274 _Ilya Gutkovskiy_, Aug 22 2017