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 A010149 #25 Dec 27 2023 00:20:32
%S A010149 8,2,1,2,1,2,16,2,1,2,1,2,16,2,1,2,1,2,16,2,1,2,1,2,16,2,1,2,1,2,16,2,
%T A010149 1,2,1,2,16,2,1,2,1,2,16,2,1,2,1,2,16,2,1,2,1,2,16,2,1,2,1,2,16,2,1,2,
%U A010149 1,2,16,2,1,2,1,2,16,2,1
%N A010149 Continued fraction for sqrt(70).
%H A010149 Harry J. Smith, <a href="/A010149/b010149.txt">Table of n, a(n) for n = 0..20000</a>
%H A010149 G. Xiao, <a href="http://wims.unice.fr/~wims/en_tool~number~contfrac.en.html">Contfrac</a>
%H A010149 <a href="/index/Con#confC">Index entries for continued fractions for constants</a>
%H A010149 <a href="/index/Rec#order_06">Index entries for linear recurrences with constant coefficients</a>, signature (0, 0, 0, 0, 0, 1).
%e A010149 8.366600265340755479781720257... = 8 + 1/(2 + 1/(1 + 1/(2 + 1/(1 + ...)))). - _Harry J. Smith_, Jun 08 2009
%t A010149 ContinuedFraction[Sqrt[70],300] (* _Vladimir Joseph Stephan Orlovsky_, Mar 08 2011 *)
%t A010149 PadRight[{8},120,{16,2,1,2,1,2}] (* _Harvey P. Dale_, Mar 25 2020 *)
%o A010149 (PARI) { allocatemem(932245000); default(realprecision, 19000); x=contfrac(sqrt(70)); for (n=0, 20000, write("b010149.txt", n, " ", x[n+1])); } \\ _Harry J. Smith_, Jun 08 2009
%Y A010149 Cf. A010522 Decimal expansion. - _Harry J. Smith_, Jun 08 2009
%K A010149 nonn,cofr
%O A010149 0,1
%A A010149 _N. J. A. Sloane_