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 A120028 #4 Jul 10 2011 18:41:28
%S A120028 3,6,10,2,8388607,1,1,10,5,1,19802808501020211999048785114,1,5,1,5,2,
%T A120028 2,10,4,1,142,3,1,1,1,1,1,2,13,16,1,83,2,4,1,15,1,62,1,20,1,2,1,1,1,9,
%U A120028 1,1,1,13,2,3,1,4,1,5,1,1,1,5,7,1,27,1,2,4,3,1,3,3,1,7,2,1,1,91,11,1,2,4,4
%N A120028 Continued fraction expansion of the value of Minkowski's question mark function at Levy's constant (Exp[Pi^2/(12*Log[2])], A086702).
%C A120028 a[92] has over 150 decimal digits, making 750332738256083509758042341909438953923620244270237443771885409340366143805720089/2^267 an excellent approximation to the constant.
%H A120028 <a href="/index/Me#MinkowskiQ">Index entries for Minkowski's question mark function</a>
%H A120028 <a href="/index/Me#MinkowskiQ">Index entries for sequences related to Minkowski's question mark function</a>
%t A120028 ContinuedFraction[cf = ContinuedFraction[Exp[Pi^2/(12*Log[2])], 50(*arbitrary precision*)]; IntegerPart[Exp[Pi^2/(12*Log[2])]] + Sum[(-1)^(k)/2^(Sum[cf[[i]], {i, 2, k}] - 1), {k, 2, Length[cf]}]]
%Y A120028 Cf. A120029.
%K A120028 cofr,nonn
%O A120028 0,1
%A A120028 Joseph Biberstine (jrbibers(AT)indiana.edu), Jun 04 2006