OFFSET
0,1
COMMENTS
Also the decimal expansion of cotangent of 50 degrees. - Ivan Panchenko, Aug 01 2014
LINKS
Ivan Panchenko, Table of n, a(n) for n = 0..1000
EXAMPLE
0.839099631177280011763127298123181364687434283012346533244102...
MATHEMATICA
RealDigits[Tan[2*Pi/9], 10, 100][[1]] (* G. C. Greubel, Nov 25 2018 *)
RealDigits[Tan[40 Degree], 10, 120][[1]] (* Harvey P. Dale, Apr 06 2022 *)
PROG
(PARI) default(realprecision, 100); tan(2*Pi/9) \\ G. C. Greubel, Nov 25 2018
(Magma) SetDefaultRealField(RealField(100)); R:= RealField(); Tan(2*Pi(R)/9); // G. C. Greubel, Nov 25 2018
(Sage) numerical_approx(tan(2*pi/9), digits=100) # G. C. Greubel, Nov 25 2018
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
STATUS
approved