OFFSET
1,2
EXAMPLE
arcsec(9)=1.4594553124539327269095933196266413907930...
MATHEMATICA
(See A195785.)
RealDigits[ArcCos[1/9], 10, 120][[1]] (* Harvey P. Dale, May 22 2014 *)
PROG
(PARI) acos(1/9) \\ Charles R Greathouse IV, Apr 09 2014
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Clark Kimberling, Sep 24 2011
STATUS
approved