OFFSET
1,2
REFERENCES
Steven R. Finch, Mathematical Constants, Cambridge University Press, 2003, Section 5.16 Extreme value constants, p. 365.
FORMULA
(21*(Pi*(Pi-5*arccsc(sqrt(3))) + 5*integral_(x=0..arccsc(sqrt(3)))(arcsin(sqrt(3)*sqrt(1/(8-tan(x)^2))))))/(2*Pi^(5/2)).
EXAMPLE
1.3521783756069043992289221668285773452932858435...
MATHEMATICA
digits = 100; mu[7] = (21*(Pi*(Pi - 5*ArcCsc[Sqrt[3]]) + 5*NIntegrate[ ArcSin[Sqrt[3]*Sqrt[1/(8 - Tan[x]^2)]], {x, 0, ArcCsc[Sqrt[3]]}, WorkingPrecision -> digits + 5]))/(2* Pi^(5/2)); RealDigits[mu[7], 10, digits] // First
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Jean-François Alcover, Jun 06 2014
STATUS
approved