OFFSET
2,1
COMMENTS
Cycles that differ by rotation or reflection are counted separately. By "n-sided cycles" we mean the cycles that can be drawn by connecting n equally spaced points on a circle (possibly self-intersecting).
LINKS
Ludovic Schwob, Illustration of a(3)
FORMULA
a(n) is always divisible by 2*n, because the considered cycles cannot have rotational symmetry.
CROSSREFS
KEYWORD
nonn
AUTHOR
Ludovic Schwob, Mar 29 2024
STATUS
approved