OFFSET
3,3
COMMENTS
This sequence provedes insight into the manner of convergence of n*tan(Pi/n) to Pi.
LINKS
Clark Kimberling, Table of n, a(n) for n = 3..2000
FORMULA
a(n) ~ 3*n^2/Pi^3. - Vaclav Kotesovec, Oct 09 2014
EXAMPLE
n ... n*tan(Pi/n)-Pi) ... 1/(n*tan(Pi/n)-Pi)
3 ... 2.05456 ........... 0.486722
4 ... 0.85840 ........... 1.16495
5 ... 0.49112 ........... 2.03616
6 ... 0.32250 ........... 3.10069
MATHEMATICA
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Clark Kimberling, Oct 07 2014
STATUS
approved