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 A248585 #8 Oct 10 2014 04:30:41
%S A248585 1,9,8,6,3,0,1,5,7,3,0,3,5,0,3,8,1,0,8,7,5,2,0,1,2,3,3,6,1,4,3,4,6,8,
%T A248585 6,2,8,7,5,8,7,0,6,3,0,8,9,8,4,7,9,7,7,7,6,2,5,6,4,7,0,2,4,9,8,4,2,3,
%U A248585 5,5,4,1,1,5,1,3,0,8,4,4,2,6,1,9,0,9,2,3,1,4,7,3,7,3,6,3,3,9,3,1,2,8
%N A248585 Decimal expansion of the value of the continued fraction constructed from prime primorials minus 1.
%H A248585 Marek Wolf, <a href="http://arxiv.org/abs/1003.4015">Continued fractions constructed from prime numbers</a>, arXiv:1003.4015 [math.NT], Sep 26 2010, p. 14.
%e A248585 0.198630157303503810875201233614346862875870630898479777625647...
%t A248585 cf = {0, 5, 29, 2309, 30029, 304250263527209, 23768741896345550770650537601358309}; RealDigits[N[FromContinuedFraction[cf], 102]] // First
%Y A248585 Cf. A005234, A006794, A018239, A057705, A242072, A247856, A247858, A247860, A248584.
%K A248585 nonn,cons
%O A248585 0,2
%A A248585 _Jean-François Alcover_, Oct 09 2014