OFFSET
0,1
COMMENTS
FORMULA
Equals 1/(4*cos(Pi/7)-2) = 1/(2*A160389-2). - Alois P. Heinz, Jun 25 2023
Equals (i^(4/7) - i^(10/7))/2. - Peter Luschny, Jun 26 2023
EXAMPLE
0.6234898018587335305250048840042398106322747308964021053655...
MAPLE
Digits := 110: evalf(((-1)^(2/7) - (-1)^(5/7))/2, Digits)*10^96:
ListTools:-Reverse(convert(floor(%), base, 10)); # Peter Luschny, Jun 25 2023
MATHEMATICA
First@ RealDigits[1/(8*Cos[Pi/7]*Sin[Pi/14]), 10, 96] (* Michael De Vlieger, Jun 25 2023 *)
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
N. J. A. Sloane, Jun 25 2023
EXTENSIONS
Simpler definition from Alois P. Heinz, Jun 25 2023.
STATUS
approved