OFFSET
1,2
LINKS
G. C. Greubel, Table of n, a(n) for n = 1..10000
FORMULA
Equals Pi - arcsin(sqrt(5/6)) = Pi - arctan(sqrt(5)). - Amiram Eldar, Jul 06 2023
EXAMPLE
arccos(-sqrt(1/6)) = 1.99133066207...
MATHEMATICA
RealDigits[ArcCos[-Sqrt[(1/6)]], 10, 120][[1]] (* Harvey P. Dale, May 30 2014 *)
PROG
(PARI) acos(-sqrt(1/6)) \\ G. C. Greubel, Aug 20 2018
(Magma) SetDefaultRealField(RealField(100)); Arccos(-Sqrt(1/6)); // G. C. Greubel, Aug 20 2018
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Clark Kimberling, Sep 23 2011
EXTENSIONS
Corrected and extended by Harvey P. Dale, May 30 2014
STATUS
approved