OFFSET
0,1
COMMENTS
A quartic number with denominator 2. - Charles R Greathouse IV, Aug 27 2017
LINKS
Ivan Panchenko, Table of n, a(n) for n = 0..1000
Wikipedia, Exact trigonometric constants
FORMULA
EXAMPLE
0.913545457...
MATHEMATICA
RealDigits[N[Cos[2*Pi/15], 110]][[1]] (* Wesley Ivan Hurt, Dec 27 2021 *)
PROG
(PARI) cos(2*Pi/15) \\ Charles R Greathouse IV, Aug 27 2017
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
STATUS
approved