OFFSET
0,1
COMMENTS
Am algebraic number of degree 12 and denominator 2. - Charles R Greathouse IV, Nov 06 2017
LINKS
Ivan Panchenko, Table of n, a(n) for n = 0..1000
FORMULA
Equals cos(7*pi/45) = 2F1(11/15,4/15;1/2;3/4) / 2. - R. J. Mathar, Oct 27 2008
EXAMPLE
0.882947592...
PROG
(PARI) sin(31/90*Pi) \\ Charles R Greathouse IV, Nov 06 2017
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
STATUS
approved