%I A091473
%S A091473 3,9,2,6,9,9,0,8,1,6,9,8,7,2,4,1,5,4,8,0,7,8,3,0,4,2,2,9,0,9,9,3,7,8,6,
%T A091473 0,5,2,4,6,4,5,4,3,4,1,8,7,2,3,1,5,9,5,9,2,6,8,1,2,2,8,5,1,6,2,0,9,3,2,
%U A091473 4,7,1,3,9,9,3,8,5,4,6,1,7,9,0,1,6,5,1,2,7,4,7,4,5,5,3,6,6,7,8
%N A091473 Integrate[Cos[2x]Product[Cos[x/n],{n,Infinity}],{x,0,Infinity}].
%C A091473 First differs from Pi/8 (A019675) in the 42nd place.
%H A091473 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               DefiniteIntegral.html">Definite Integral</a>
%H A091473 D. H. Bailey, J. M. Borwein, V. Kapoor and E. Weisstein, <a href="http:/
               /eprints.cecm.sfu.ca/archive/00000270/">Ten Problems in Experimental 
               Mathematics</a>
%e A091473 0.3926990816987...
%Y A091473 Sequence in context: A155080 A010780 A076420 this_sequence A019675 A050129 
               A070343
%Y A091473 Adjacent sequences: A091470 A091471 A091472 this_sequence A091474 A091475 
               A091476
%K A091473 nonn,cons
%O A091473 0,1
%A A091473 Eric Weisstein (eric(AT)weisstein.com), Jan 13, 2004