%I A054399
%S A054399 3,8,1,6,8,8,3,3,8,3,3,9,6,8,5,3,0,1,3,0,1,4,1,7,9,9,7,9,7,7,7,4,5,0,3,
%T A054399 6,4,4,3,5,8,9,8,0,2,7,4,1,8,7,6,7,5,5,3,9,5,2,9,0,6,0,4,7,6,8,9,9,4,7,
%U A054399 6,6,0,8,8,8,1,9,7,5,8,6,9,7,5,7,0,3,7,6,1,6,4,4,2,2,8,0,6,7,9,9,7,7,1
%N A054399 Decimal expansion of the constant Product_{i=1..inf} ((1-3/(2*(i+1)))^(1/
               2^i).
%D A054399 D.-Z. Du and F. K. Hwang, Combinatorial Group Testing and Its Applications, 
               World Scientific, 2nd ed., 2000; p. 37.
%e A054399 .381688338339685...
%o A054399 (PARI)\p 500; prodinf(n=1,((1-3/(2*(n+1)))^(1/2^n)))
%Y A054399 A054400/4.
%Y A054399 Sequence in context: A016550 A086245 A021266 this_sequence A013676 A131563 
               A016622
%Y A054399 Adjacent sequences: A054396 A054397 A054398 this_sequence A054400 A054401 
               A054402
%K A054399 nonn,easy,cons
%O A054399 0,1
%A A054399 N. J. A. Sloane (njas(AT)research.att.com), May 22 2000
%E A054399 More terms from Jason Earls (zevi_35711(AT)yahoo.com), Jun 28 2001