OFFSET
0,1
FORMULA
Equals (49 + 3*sqrt(5))/62.
Equals Sum_{k>=0} cos(8 k*Pi/5)/2^k.
Minimal polynomial: 19 - 49 x + 31 x^2.
Equals 2 - 2*A373017. - R. J. Mathar, Aug 27 2024
EXAMPLE
0.8985194182661188562778632420353843339729...
MATHEMATICA
{b, m, h} = {2, 5, 2}; s = Sum[Cos[ h k Pi/m]/b^k, {k, 0, Infinity}]
d = N[s, 100]
First[RealDigits[d], 100]
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Clark Kimberling, Jul 20 2024
STATUS
approved