OFFSET
0,1
LINKS
G. C. Greubel, Table of n, a(n) for n = 0..10000
FORMULA
Equals Integral_{x >= 0} exp(-4*x)*sin(x)/x dx. - Peter Bala, Nov 05 2019
Equals arcsin(1/sqrt(17)) = arccos(4/sqrt(17)) = arctan(1/4). - Amiram Eldar, Jul 11 2023
EXAMPLE
arccot(4) = 0.24497866312686...
MATHEMATICA
(See A195628.)
RealDigits[ArcCot[4], 10, 120][[1]] (* Harvey P. Dale, Jan 09 2015 *)
PROG
(PARI) atan(1/4) \\ G. C. Greubel, Aug 20 2018
(Magma) SetDefaultRealField(RealField(100)); Arccot(4) // G. C. Greubel, Aug 20 2018
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Clark Kimberling, Sep 23 2011
STATUS
approved