OFFSET
1,1
LINKS
FORMULA
Equals Pi - arcsin(sqrt(3/8)) = Pi - arctan(sqrt(3/5)). - Amiram Eldar, Jul 06 2023
EXAMPLE
2.48253461776338...
MATHEMATICA
(See A195707.)
RealDigits[ArcCos[-Sqrt[(5/8)]], 10, 120][[1]] (* Harvey P. Dale, Mar 12 2013 *)
PROG
(PARI) acos(-sqrt(5/8)) \\ G. C. Greubel, Aug 19 2018
(Magma) SetDefaultRealField(RealField(100)); Arccos(-Sqrt(5/8)); // G. C. Greubel, Aug 19 2018
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Clark Kimberling, Sep 23 2011
STATUS
approved