OFFSET
0,1
FORMULA
Equals (49 - 3*sqrt(5))/62.
Equals Sum_{k>=0} cos(6 k*Pi/5)/2^k.
Minimal polynomial: 19 - 49 x + 31 x^2.
EXAMPLE
0.6821257430242037243672980482871963111...
MATHEMATICA
{b, m, h} = {2, 5, 4}; 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