OFFSET
1,1
COMMENTS
Decimal expansion of the ratio of the perimeter of a regular 7-gon (heptagon) to its diameter (largest diagonal).
LINKS
G. C. Greubel, Table of n, a(n) for n = 1..10000
FORMULA
Equals 14*A232736.
EXAMPLE
3.115293075388401660044635902955126632528977962703629374367818222563897248...
MATHEMATICA
RealDigits[14*Sin[Pi/14], 10, 129][[1]] (* G. C. Greubel, Sep 20 2022 *)
PROG
(PARI) 14*sin(Pi/14)
(SageMath) numerical_approx(14*sin(pi/14), digits=127) # G. C. Greubel, Sep 20 2022
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Rick L. Shepherd, Jan 04 2017
STATUS
approved