OFFSET
1,1
COMMENTS
The ratio of the perimeter of a regular 11-gon (hendecagon) to its diameter (largest diagonal).
Also least positive root of x^5 - 11x^4 - 484x^3 + 3993x^2 + 43923x - 161051.
EXAMPLE
3.130926442012273089763438709560132713403129944771655225197821304298120771...
MAPLE
evalf(22*sin(Pi/22), 100); # Wesley Ivan Hurt, Feb 01 2017
MATHEMATICA
RealDigits[22*Sin[Pi/22], 10, 120][[1]] (* Amiram Eldar, Jun 26 2023 *)
PROG
(PARI) 22*sin(Pi/22)
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Rick L. Shepherd, Jan 07 2017
STATUS
approved