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 A040447 #19 Jul 08 2025 23:18:05
%S A040447 21,1,1,1,10,6,10,1,1,1,42,1,1,1,10,6,10,1,1,1,42,1,1,1,10,6,10,1,1,1,
%T A040447 42,1,1,1,10,6,10,1,1,1,42,1,1,1,10,6,10,1,1,1,42,1,1,1,10,6,10,1,1,1,
%U A040447 42,1,1,1,10,6,10,1,1,1,42,1,1,1,10,6,10,1,1,1,42,1
%N A040447 Continued fraction for sqrt(469).
%H A040447 <a href="/index/Con#confC">Index entries for continued fractions for constants</a>
%H A040447 <a href="/index/Rec#order_10">Index entries for linear recurrences with constant coefficients</a>, signature (0, 0, 0, 0, 0, 0, 0, 0, 0, 1).
%p A040447 with(numtheory): Digits := 300: convert(evalf(sqrt(469)),confrac);
%t A040447 ContinuedFraction[Sqrt[469],90] (* or *) PadRight[{21},90,{42,1,1,1,10,6,10,1,1,1}] (* _Harvey P. Dale_, Mar 23 2013 *)
%K A040447 nonn,cofr,easy,less
%O A040447 0,1
%A A040447 _N. J. A. Sloane_