OFFSET
0,1
FORMULA
Equals Product_{k>=1} (1 - 1/(5*k)^2).
Equals A258403/Pi. - Hugo Pfoertner, Apr 01 2024
EXAMPLE
0.93548928378863903321291906615298281...
MATHEMATICA
RealDigits[5 Sqrt[3 - GoldenRatio]/(2 Pi), 10, 99][[1]]
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Ilya Gutkovskiy, Apr 01 2024
STATUS
approved