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 A054400 Decimal expansion of 4 * Product_{i=1..inf} ((1-3/(2*(i+1)))^(1/2^i). 1
 1, 5, 2, 6, 7, 5, 3, 3, 5, 3, 3, 5, 8, 7, 4, 1, 2, 0, 5, 2, 0, 5, 6, 7, 1, 9, 9, 1, 9, 1, 0, 9, 8, 0, 1, 4, 5, 7, 7, 4, 3, 5, 9, 2, 1, 0, 9, 6, 7, 5, 0, 7, 0, 2, 1, 5, 8, 1, 1, 6, 2, 4, 1, 9, 0, 7, 5, 9, 7, 9, 0, 6, 4, 3, 5, 5, 2, 7, 9, 0, 3, 4, 7, 9, 0, 2, 8, 1, 5, 0, 4, 6, 5, 7, 6, 9, 1, 2, 2, 7, 1, 9, 9, 0, 8 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 REFERENCES D.-Z. Du and F. K. Hwang, Combinatorial Group Testing and Its Applications, World Scientific, 2nd ed., 2000; p. 37. LINKS EXAMPLE 1.52675335335... MATHEMATICA digits = 105; 4*NProduct[ (1-3/(2*(i+1)))^(1/2^i), {i, 1, Infinity}, WorkingPrecision -> digits+5, NProductFactors -> 4*digits] // RealDigits[#, 10, digits]& // First (* Jean-François Alcover, Mar 07 2013 *) CROSSREFS 4*A054399. Sequence in context: A158624 A021659 A011506 * A035568 A321074 A318384 Adjacent sequences:  A054397 A054398 A054399 * A054401 A054402 A054403 KEYWORD nonn,easy,cons AUTHOR N. J. A. Sloane, May 22 2000 EXTENSIONS More terms from David Wasserman, Mar 04 2002 STATUS approved

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Last modified August 4 16:34 EDT 2020. Contains 336202 sequences. (Running on oeis4.)