%I A013707
%S A013707 6,9,3,1,3,7,1,8,0,6,5,9,9,4,5,3,0,9,3,9,7,2,3,2,1,2,1,4,7,4,1,7,6,
%T A013707 5,6,8,0,4,8,3,0,0,1,3,4,4,6,5,7,2
%N A013707 Decimal expansion of sum_{k=1}^{50,000} \frac{(-1)^{k+1}}{k}.
%D A013707 J. M. Borwein, P. B. Borwein and K. Dilcher, Pi, Euler numbers and asymptotic 
               expansions, Amer. Math. Monthly, 96 (1989), 681-687.
%H A013707 J. M. Borwein and R. M. Corless, <a href="http://www.cecm.sfu.ca/~jborwein/
               sloane/sloane.html">Review of ``An Encyclopedia of Integer Sequences'' 
               by N. J. A. Sloane and Simon Plouffe"</a>, SIAM Review, 38 (1996), 
               333-337.
%Y A013707 Cf. A013705, A013706.
%Y A013707 Sequence in context: A010502 A129938 A022698 this_sequence A002162 A072365 
               A085138
%Y A013707 Adjacent sequences: A013704 A013705 A013706 this_sequence A013708 A013709 
               A013710
%K A013707 cons,nonn,easy,nice
%O A013707 0,1
%A A013707 N. J. A. Sloane (njas(AT)research.att.com).