OFFSET
0,1
COMMENTS
FORMULA
Equals arctan(sqrt(LambertW(1))).
EXAMPLE
0.6454752445650039244357315545660663652246772055940215161816...
MATHEMATICA
Omega=LambertW[1]; xi=ArcTan[Sqrt[Omega]]; N[xi, 120]
PROG
(PARI) atan(sqrt(lambertw(1)))
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Gleb Koloskov, Mar 09 2021
STATUS
approved