OFFSET
1,2
LINKS
G. C. Greubel, Table of n, a(n) for n = 1..10000
FORMULA
Equals arctan(1) + arctan(1/2). - Charles R Greathouse IV, Sep 23 2014
Equals arcsin(3/sqrt(10)) = arccos(sqrt(1/10)). - Amiram Eldar, Jul 11 2023
EXAMPLE
arctan(3) = 1.2490457723982544258299170772...
MATHEMATICA
PROG
(PARI) atan(3) \\ Charles R Greathouse IV, Sep 23 2014
(Magma) SetDefaultRealField(RealField(100)); Arctan(3); // G. C. Greubel, Aug 20 2018
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Clark Kimberling, Sep 23 2011
STATUS
approved