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 A087197 Decimal expansion of 1/sqrt(Pi). 18
 5, 6, 4, 1, 8, 9, 5, 8, 3, 5, 4, 7, 7, 5, 6, 2, 8, 6, 9, 4, 8, 0, 7, 9, 4, 5, 1, 5, 6, 0, 7, 7, 2, 5, 8, 5, 8, 4, 4, 0, 5, 0, 6, 2, 9, 3, 2, 8, 9, 9, 8, 8, 5, 6, 8, 4, 4, 0, 8, 5, 7, 2, 1, 7, 1, 0, 6, 4, 2, 4, 6, 8, 4, 4, 1, 4, 9, 3, 4, 1, 4, 4, 8, 6, 7, 4, 3, 6, 6, 0, 2, 0, 2, 1, 0, 7, 3, 6, 3, 4, 4, 3, 0, 2, 8 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS Radius of a circle with area 1. Limit_{n -> infinity} Catalan(n)/(4^n*n^(-3/2)). - Jean-François Alcover, May 23 2013 Expectation of the maximum of a size 2 sample from a normal (0,1) distribution. - Jean-François Alcover, Jun 05 2014 REFERENCES Steven R. Finch, Mathematical Constants, Cambridge University Press, 2003, Section 5.16 Extreme value constants, p. 365. LINKS G. C. Greubel, Table of n, a(n) for n = 0..5000 Eric Weisstein's World of Mathematics, Inverse Erf EXAMPLE 0.56418958354775628694... MATHEMATICA RealDigits[1/Sqrt[Pi], 10, 50][[1]] (* G. C. Greubel, Jan 09 2017 *) PROG (PARI) Pi^-.5 \\ Charles R Greathouse IV, Nov 13 2015 CROSSREFS Cf. A086201, A087198, A087199. Sequence in context: A257837 A099038 A064206 * A221216 A229073 A019818 Adjacent sequences:  A087194 A087195 A087196 * A087198 A087199 A087200 KEYWORD cons,easy,nonn AUTHOR Sven Simon, Aug 24 2003 STATUS approved

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Last modified August 16 00:25 EDT 2018. Contains 313782 sequences. (Running on oeis4.)