OFFSET
1,1
LINKS
Eric Weisstein's World of Mathematics, Arithmetic-Geometric Mean.
Eric Weisstein's World of Mathematics, Complete Elliptic Integral of the First Kind.
FORMULA
Equals 5*Pi/(4*EllipticK(1/25)), where EllipticK is the complete elliptic integral of the first kind. - Amiram Eldar, Jun 01 2023
EXAMPLE
2.47468043623630446260665960359140148925167409406673586682618274063...
MATHEMATICA
RealDigits[ArithmeticGeometricMean[2, 3], 10, 120][[1]] (* Harvey P. Dale, Nov 26 2020 *)
PROG
(PARI) agm(2, 3) \\ Charles R Greathouse IV, Oct 18 2011
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Zak Seidov, Oct 05 2002
STATUS
approved