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 A085825 #9 Dec 27 2015 04:07:16
%S A085825 2,5,3,6,0,2,7,0,8,1,6,8,9,3,3,8,3,9,2,3,0,6,9,4,9,0,8,2,1,3,5,1,9,6,
%T A085825 2,0,5,7,3,1,5,3,6,5,0,3,6,4,7,3,4,4,8,7,9,4,5,6,6,6,5,8,6,5,6,0,6,0,
%U A085825 9,5,3,4,3,0,8,0,4,3,3,4,5,2,8,4,8,9,2,4,9,6,7,8,1,8,1,0,4,0,4,5,1,8,1,3,5
%N A085825 Decimal expansion of number with continued fraction 2 + 3/5 + 7/11 + 13/17 + 19/23 + ...
%C A085825 Mark A. Herkommer, Number Theory, A Programmer's Guide, McGraw-Hill, NY, 1999, p. 181.
%H A085825 Mark A. Herkommer, <a href="http://www.herkommer.org/misc/herk_num.htm">The Incredible Herkommer Number</a>
%H A085825 Mark A. Herkommer, <a href="http://www.herkommer.org/misc/contfrac.htm">Continued Fractions</a>
%e A085825 2.5360270816893...
%t A085825 s = 0; Do[s = Prime[2n] / (Prime[2n + 1] + s), {n, 70, 1, -1}]; RealDigits[2 + s, 10, 111][[1]]
%Y A085825 Cf. A000796.
%K A085825 cons,nonn
%O A085825 1,1
%A A085825 _Robert G. Wilson v_, Jul 05 2003