OFFSET
0,1
COMMENTS
There are no l-reflexive polygons for even index l.
LINKS
Andrey Zabolotskiy, Table of n, a(n) for n = 0..99 (from the Graded Ring Database)
Dimitrios I. Dais, On the Twelve-Point Theorem for l-Reflexive Polygons, arXiv:1806.08351 [math.CO], 2018.
A. M. Kasprzyk and B. Nill, Reflexive polytopes of higher index and the number 12, arXiv:1107.4945 [math.AG], 2011.
A. M. Kasprzyk and B. Nill, Toric l-reflexive surfaces at Graded Ring Database.
FORMULA
It seems that for n > 2, a(n) = 17*n - k where k = 21, 22, 23, 24 iff 2*n+1 is a prime from A068228, A068229, A040117, A068231, respectively. - Andrey Zabolotskiy, Apr 21 2022
EXAMPLE
a(0)=16 equals the number of isomorphism classes of (1-)reflexive polygons, A090045(2).
CROSSREFS
KEYWORD
nonn
AUTHOR
Benjamin Nill, Jul 02 2012
STATUS
approved