OFFSET
0,4
COMMENTS
a(n) is the total length (rounded down to integer) of the elements of a variant of a 3-element fractal after n iterations, starting with 3 elements, each of whose length is 1/3 (in some units). See illustration in the links.
LINKS
Harvey P. Dale, Table of n, a(n) for n = 0..1000
Kival Ngaokrajang, Illustration of initial terms
FORMULA
a(n) = floor((3/sqrt(5))^n).
MATHEMATICA
With[{c=3/Sqrt[5]}, Table[Floor[c^n], {n, 0, 50}]] (* Harvey P. Dale, Oct 23 2023 *)
PROG
(PARI){for(n=0, 100, a=floor((3/sqrt(5))^n); print1(a, ", "))}
CROSSREFS
KEYWORD
nonn
AUTHOR
Kival Ngaokrajang, Feb 25 2015
STATUS
approved