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 A114609 Decimal expansion of Sum_{k=-infinity..+infinity} log(2)/(2^(-k/2) + 2^(k/2)). 1
 3, 1, 4, 1, 5, 9, 2, 6, 5, 3, 5, 9, 5, 1, 8, 2, 3, 8, 3, 2, 8, 8, 4, 2, 3, 9, 5, 1, 3, 3, 7, 1, 9, 5, 7, 4, 6, 4, 7, 4, 3, 0, 2, 5, 6, 3, 7, 8, 1, 8, 2, 2, 2, 9, 2, 9, 0, 4, 4, 4, 3, 1, 7, 2, 5, 0, 9, 1, 3, 0, 3, 0, 4, 8, 2, 7, 0, 4, 2, 4, 1, 7, 6, 1, 0, 1, 2, 3, 7, 5, 1, 5, 3, 5, 6, 7, 5, 8, 5, 1, 1, 9 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS Differs from Pi by 5.3*10^-12. LINKS Eric Weisstein's World of Mathematics, Almost Integer EXAMPLE 3.14159265359518238328842... MATHEMATICA almostPi = Log[2]/2 + 2*Log[2]*NSum[1/(2^(-k/2) + 2^(k/2)), {k, 1, Infinity}, WorkingPrecision -> 110, NSumTerms -> 100]; RealDigits[almostPi, 10, 102] // First (* Jean-François Alcover, Feb 07 2013 *) CROSSREFS Sequence in context: A112602 A000796 A212131 * A271452 A068089 A068079 Adjacent sequences:  A114606 A114607 A114608 * A114610 A114611 A114612 KEYWORD nonn,cons AUTHOR Eric W. Weisstein, Dec 15 2005 STATUS approved

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Last modified June 5 15:37 EDT 2020. Contains 334852 sequences. (Running on oeis4.)