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 A016538 #14 Dec 24 2015 23:25:12
%S A016538 2,2,1,5,2,30,10,2,1,1,1,1,38,1,1,1,1,6,2,2,1,26,1,1,2,2,2,1,42,2,2,1,
%T A016538 5,2,2,7,1,1,2,5,1,1,3,1,1,1,1,1,4,1,2,2,1,1,5,2,3,1,1,1,2,9,1,1,2,1,
%U A016538 3,2,1,1,7,2,3,2,2,2,1,21,1
%N A016538 Continued fraction for log(21/2).
%H A016538 Harry J. Smith, <a href="/A016538/b016538.txt">Table of n, a(n) for n = 1..20000</a>
%H A016538 G. Xiao, <a href="http://wims.unice.fr/~wims/en_tool~number~contfrac.en.html">Contfrac</a>
%e A016538 2.351375257163477687083365858... = 2 + 1/(2 + 1/(1 + 1/(5 + 1/(2 + ...)))). - _Harry J. Smith_, May 26 2009
%t A016538 ContinuedFraction[Log[21/2],80] (* _Harvey P. Dale_, Jun 19 2013 *)
%o A016538 (PARI) { allocatemem(932245000); default(realprecision, 21000); x=contfrac(log(21/2)); for (n=1, 20000, write("b016538.txt", n, " ", x[n])); } \\ _Harry J. Smith_, May 26 2009
%Y A016538 Cf. A016587 Decimal expansion. - _Harry J. Smith_, May 26 2009
%K A016538 nonn,cofr
%O A016538 1,1
%A A016538 _N. J. A. Sloane_