OFFSET
1,2
COMMENTS
The polygons are counted as nonequivalent by reflection and rotation.
No even-sided polygons follow this rule.
This is the number of harmonious labelings on a cycle. See A329910 for the definition of harmonious labelings. - Wenjie Fang, Oct 14 2022
LINKS
Giovanni Resta, Illustration of a(3) and a(4)
EXAMPLE
For n=2, the a(2)=2 solutions for 2*2+1 = 5 sides are the regular pentagon and pentagram.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Ludovic Schwob, Jul 23 2019
EXTENSIONS
a(7)-a(9) from Giovanni Resta, Jul 27 2019
STATUS
approved