OFFSET
1,1
LINKS
G. C. Greubel, Table of n, a(n) for n = 1..10000
EXAMPLE
arccos(-(1/2)^(2/3)) = 2.252298708476310160...
MATHEMATICA
r = (1/2)^(2/3);
N[ArcCos[-r], 100]
RealDigits[%]
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
KEYWORD
nonn,cons
AUTHOR
Clark Kimberling, Sep 23 2011
STATUS
approved