A195715 Decimal expansion of arccos(-(1/2)^(1/3)).

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

Offset

1,1

Links

G. C. Greubel, Table of n, a(n) for n = 1..10000

Example

arccos(-(1/2)^(1/3)) = 2.4876647110895...

Mathematica

r = (1/2)^(1/3);
N[ArcCos[-r], 100]
RealDigits[%]  (* A195715 *)
RealDigits[ArcCos[Surd[(-1/2), 3]], 10, 120][[1]] (* Harvey P. Dale, Feb 22 2018 *)

Prog

(PARI) acos(-(1/2)^(1/3)) \\ G. C. Greubel, Aug 20 2018
(Magma) SetDefaultRealField(RealField(100)); Arccos(-(1/2)^(1/3)); // G. C. Greubel, Aug 20 2018

Crossrefs

Cf. A195712.

Sequence in context: A021406 A065075 A001370 * A343629 A039794 A113417

Adjacent sequences: A195712 A195713 A195714 * A195716 A195717 A195718

Keyword

nonn,cons

Author

Clark Kimberling, Sep 23 2011

Status

approved