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A192930 Decimal expansion of Pi*cos(phi) - Pi/2, where phi is the constant defined by A191102. 2
9, 1, 5, 0, 8, 9, 6, 4, 0, 7, 9, 6, 3, 4, 2, 0, 9, 3, 4, 2, 1, 9, 8, 3, 8, 1, 4, 1, 7, 5, 9, 3, 1, 0, 7, 1, 0, 9, 2, 9, 6, 2, 8, 9, 7, 1, 4, 9, 7, 3, 8, 6, 0, 1, 1, 3, 2, 9, 2, 1, 4, 2, 0, 7, 9, 0, 5, 8, 2, 2, 1, 8, 8, 2, 2, 5, 9, 2, 4, 8, 4, 2, 3, 4, 4, 8, 0, 7, 5, 4, 0, 0, 4, 4, 4, 3, 3, 9, 0 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

G. C. Greubel, Table of n, a(n) for n = 0..10000

M. Fraser, A tale of two goats, Math. Mag., 55 (1982), 221-227.

EXAMPLE

.91508964079634209342198381417593107109296289714973860113292...

MATHEMATICA

RealDigits[Pi*(Cos[ArcCos[6/Pi^2 -1]/3] -1/2), 10, 100][[1]] (* G. C. Greubel, Feb 06 2019 *)

PROG

(PARI) Pi*cos(acos(6/Pi^2-1)/3) - Pi/2 \\ Michel Marcus, Sep 19 2017

(MAGMA) SetDefaultRealField(RealField(100)); R:= RealField(); Pi(R)*( Cos(Arccos(6/Pi(R)^2 -1)/3) -1/2); // G. C. Greubel, Feb 06 2019

(Sage) numerical_approx(pi*(cos(acos(6/pi^2 -1)/3) - 1/2), digits=100) # G. C. Greubel, Feb 06 2019

CROSSREFS

Sequence in context: A114893 A089101 A298512 * A010168 A197684 A121224

Adjacent sequences:  A192927 A192928 A192929 * A192931 A192932 A192933

KEYWORD

nonn,cons

AUTHOR

N. J. A. Sloane, Jul 12 2011

STATUS

approved

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Last modified July 22 17:02 EDT 2019. Contains 325225 sequences. (Running on oeis4.)