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 A300713 Decimal expansion of sqrt(Pi^2/6 - 1) = sqrt(zeta(2) - 1). 4
 8, 0, 3, 0, 7, 7, 8, 7, 0, 9, 7, 4, 0, 5, 8, 4, 2, 8, 1, 8, 4, 3, 2, 1, 2, 4, 4, 6, 6, 9, 0, 3, 4, 8, 2, 3, 1, 8, 9, 8, 9, 1, 0, 9, 9, 6, 4, 0, 9, 6, 6, 1, 3, 6, 6, 2, 9, 8, 4, 3, 5, 0, 7, 2, 1, 4, 7, 9, 8, 3, 5, 6, 0, 5, 0, 9, 0, 4, 6, 4, 2, 0, 1, 0, 8, 2, 0, 8, 7, 6, 3, 8, 5, 8, 2, 6, 6, 5, 0, 6, 7, 3, 2 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS Also the total harmonic distortion (THD) of a sawtooth signal, see formula (15) in the Blagouchine & Moreau link. LINKS I. V. Blagouchine and E. Moreau, Analytic Method for the Computation of the Total Harmonic Distortion by the Cauchy Method of Residues. IEEE Trans. Commun., vol. 59, no. 9, pp. 2478-2491, 2011. PDF file. FORMULA Equals sqrt(A013661 - 1). EXAMPLE 0.8030778709740584281843212446690348231898910996409661... MAPLE evalf(sqrt((1/6)*Pi^2-1), 120) MATHEMATICA RealDigits[Sqrt[Pi^2/6 - 1], 10, 120][[1]] PROG (PARI) default(realprecision, 120); sqrt(Pi^2/6-1) (MATLAB) format long; sqrt(pi^2/6-1) CROSSREFS Cf. A013661, A300690, A300714, A300727, A300731. Sequence in context: A179068 A144455 A251866 * A020837 A248679 A175574 Adjacent sequences:  A300710 A300711 A300712 * A300714 A300715 A300716 KEYWORD nonn,cons AUTHOR Iaroslav V. Blagouchine, Mar 11 2018 STATUS approved

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Last modified January 26 14:08 EST 2020. Contains 331280 sequences. (Running on oeis4.)