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A195731 Decimal expansion of arcsec(4). 2

%I

%S 1,3,1,8,1,1,6,0,7,1,6,5,2,8,1,7,9,6,5,7,4,5,6,6,4,2,5,4,6,4,6,0,4,0,

%T 4,6,9,8,4,6,3,9,0,9,6,6,5,9,0,7,1,4,7,1,6,8,5,3,5,4,8,5,1,7,4,1,3,3,

%U 3,3,1,4,2,6,6,2,0,8,3,2,7,6,9,0,2,2,6,8,6,7,0,4,4,3,0,4,3,9,3,2

%N Decimal expansion of arcsec(4).

%H G. C. Greubel, <a href="/A195731/b195731.txt">Table of n, a(n) for n = 1..10000</a>

%e arcsec(4) = 1.318116071652817965...

%t r=4;

%t N[ArcSec[r], 100]

%t RealDigits[%]

%o (PARI) acos(1/4) \\ _G. C. Greubel_, Aug 20 2018

%o (MAGMA) SetDefaultRealField(RealField(100)); Arccos(1/4); // _G. C. Greubel_, Aug 20 2018

%Y Cf. A195628.

%K nonn,cons

%O 1,2

%A _Clark Kimberling_, Sep 23 2011

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Last modified July 19 08:49 EDT 2019. Contains 325155 sequences. (Running on oeis4.)