OFFSET
1,4
COMMENTS
Equals Pi/2 - arctan(2/Pi). [Bruno Berselli, Nov 20 2013]
EXAMPLE
Equals 1.003884821853887214148..
MAPLE
evalf(arctan(Pi/2)) ;
CROSSREFS
KEYWORD
cons,nonn
AUTHOR
R. J. Mathar, Nov 20 2013
STATUS
editing