OFFSET
1,3
REFERENCES
Steven R. Finch, Mathematical Constants, Cambridge University Press, 2003, Section 5.16 Extreme value constants, p. 365.
LINKS
G. C. Greubel, Table of n, a(n) for n = 1..5000
FORMULA
5/sqrt(Pi) - 15*arccsc(sqrt(3))/Pi^(3/2).
EXAMPLE
1.1629644736405196127722679885505014941...
MATHEMATICA
RealDigits[5/Sqrt[Pi] - 15*ArcCsc[Sqrt[3]]/Pi^(3/2), 10, 102] // First
PROG
(PARI) 5/sqrt(Pi) - 15*asin(1/sqrt(3))/Pi^(3/2) \\ G. C. Greubel, Feb 01 2017
CROSSREFS
KEYWORD
AUTHOR
Jean-François Alcover, Jun 05 2014
STATUS
approved