login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A195717
Decimal expansion of arccos((1/2)^(2/3)).
2
8, 8, 9, 2, 9, 3, 9, 4, 5, 1, 1, 3, 4, 8, 3, 0, 7, 8, 2, 7, 5, 4, 5, 8, 2, 5, 9, 4, 8, 0, 8, 5, 6, 3, 8, 1, 5, 3, 9, 2, 1, 0, 4, 5, 2, 4, 6, 9, 2, 1, 5, 2, 7, 3, 4, 6, 4, 7, 5, 0, 0, 4, 2, 0, 2, 1, 8, 3, 0, 9, 2, 0, 1, 2, 3, 3, 9, 0, 3, 6, 3, 6, 1, 9, 6, 5, 7, 6, 1, 5, 1, 7, 5, 9, 6, 7, 8, 9, 1, 7
OFFSET
0,1
EXAMPLE
arccos((1/2)^(2/3)) = 0.8892939451134830782754582594808563...
MATHEMATICA
r = (1/2)^(2/3);
N[ArcCos[r], 100]
RealDigits[%] (* A195717 *)
RealDigits[ArcCos[(1/2)^(2/3)], 10, 100][[1]] (* G. C. Greubel, Aug 20 2018 *)
PROG
(PARI) acos((1/2)^(2/3)) \\ G. C. Greubel, Aug 20 2018
(Magma) SetDefaultRealField(RealField(100)); Arccos((1/2)^(2/3)); // G. C. Greubel, Aug 20 2018
CROSSREFS
Cf. A195716.
Sequence in context: A252850 A316163 A346908 * A309930 A193781 A200492
KEYWORD
nonn,cons
AUTHOR
Clark Kimberling, Sep 23 2011
STATUS
approved