OFFSET
0,4
COMMENTS
Inspired by A255405, but starting with a unit circle and an equilateral triangle whose area is equal to Pi.
a(n) is the curvature (rounded down) of the n-th nested circle. See illustration in the links.
LINKS
G. C. Greubel, Table of n, a(n) for n = 0..5000
Kival Ngaokrajang, Illustration of initial terms.
FORMULA
a(n) = floor(((sqrt(sqrt(3))^3)/sqrt(Pi))^n).
MAPLE
A255575:=n->floor(((sqrt(sqrt(3))^3)/sqrt(Pi))^n): seq(A255575(n), n=0..70); # Wesley Ivan Hurt, Apr 28 2017
MATHEMATICA
Table[Floor[(Sqrt[Sqrt[3]]^3/Sqrt[Pi])^n], {n, 51}] (* Michael De Vlieger, Feb 25 2015 *)
PROG
(PARI){for(n=0, 100, a=floor(((sqrt(sqrt(3))^3)/sqrt(Pi))^n); print1(a, ", "))}
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Kival Ngaokrajang, Feb 25 2015
STATUS
approved