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 A089261 #9 Feb 16 2025 08:32:51
%S A089261 0,5,2,3,1,2,2,5,6,13,2,7,2,2,1,1,5,1,4,1,4,16,1,1,2,1,1,4,2,1,1,3,1,
%T A089261 2,2,1,6,1,4,4,1,7,2,1,2,3,1,1,7,2,1,16,1,2,1,1,67,462,1,2,4,1,3,1,1,
%U A089261 1,1,1,3,1,1,3,1,14,1,1,2,1,1,1,9,2,2,1,1107,2,3,10,2,4,1,1,1,1,1,44,1,1,4
%N A089261 Continued fraction expansion of -x, the largest negative root of the equation Fibonacci(x) = 0.
%H A089261 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/FibonacciNumber.html">Fibonacci Number</a>
%t A089261 ContinuedFraction[ -x/.FindRoot[Fibonacci[x]==0, {x, -0.2}, WorkingPrecision->100], 100]
%Y A089261 Cf. A089260 (decimal expansion).
%K A089261 cofr,nonn
%O A089261 0,2
%A A089261 _T. D. Noe_, Oct 27 2003
%E A089261 Offset changed by _Andrew Howroyd_, Aug 07 2024