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 A016491 #13 Dec 24 2015 23:33:24
%S A016491 4,6,1,72,1,1,1,36,4,7,1,2,5,5,1,6,2,1,9,1,4,1,1,9,2,8,1,10,1,4,1,2,1,
%T A016491 2,2,4,6,1,33,2,8,1,1,1,1,4,1,1,12,1,1,1,1,8,7,1,2,1,1019,4,2,6,1604,
%U A016491 1,1,6,3,12,1,1,7,2,1,8,11
%N A016491 Continued fraction for log(63).
%H A016491 Harry J. Smith, <a href="/A016491/b016491.txt">Table of n, a(n) for n = 1..20000</a>
%e A016491 4.14313472639153268789584321... = 4 + 1/(6 + 1/(1 + 1/(72 + 1/(1 + ...)))). - _Harry J. Smith_, May 22 2009
%t A016491 ContinuedFraction[Log[63],100] (* _Harvey P. Dale_, Nov 30 2015 *)
%o A016491 (PARI) { allocatemem(932245000); default(realprecision, 21000); x=contfrac(log(63)); for (n=1, 20000, write("b016491.txt", n, " ", x[n])); } \\ _Harry J. Smith_, May 22 2009
%Y A016491 Cf. A016686 Decimal expansion. - _Harry J. Smith_, May 22 2009
%K A016491 nonn,cofr
%O A016491 1,1
%A A016491 _N. J. A. Sloane_