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 A010213 #25 Dec 27 2023 00:40:39
%S A010213 12,1,5,2,5,1,24,1,5,2,5,1,24,1,5,2,5,1,24,1,5,2,5,1,24,1,5,2,5,1,24,
%T A010213 1,5,2,5,1,24,1,5,2,5,1,24,1,5,2,5,1,24,1,5,2,5,1,24,1,5,2,5,1,24,1,5,
%U A010213 2,5,1,24,1,5,2,5,1,24,1,5
%N A010213 Continued fraction for sqrt(165).
%H A010213 G. Xiao, <a href="http://wims.unice.fr/~wims/en_tool~number~contfrac.en.html">Contfrac</a>
%H A010213 <a href="/index/Con#confC">Index entries for continued fractions for constants</a>
%H A010213 <a href="/index/Rec#order_06">Index entries for linear recurrences with constant coefficients</a>, signature (0, 0, 0, 0, 0, 1).
%t A010213 ContinuedFraction[Sqrt[165],300] (* _Vladimir Joseph Stephan Orlovsky_, Mar 25 2011 *)
%t A010213 PadRight[{12},120,{24,1,5,2,5,1}] (* _Harvey P. Dale_, Feb 02 2020 *)
%K A010213 nonn,cofr
%O A010213 0,1
%A A010213 _N. J. A. Sloane_