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A374975
Number of equivalence classes of lattice polygons contained in a square of side length n but not in a square of side length n-1.
1
2, 15, 131, 1369, 13842, 129185, 1104895, 8750964, 64714465, 450686225, 2976189422
OFFSET
1,1
LINKS
Gavin Brown and Alexander M. Kasprzyk, Small polygons and toric codes, J. Symbolic Comput. 51 (2013), pp. 55-62.
Justus Springer and Martin Bohnert, Classifying rational polygons with small denominator and few interior lattice points, arxiv:2410.17244 [math.CO], 2024.
EXAMPLE
For n = 1, only the square itself and the standard triangle are contained in the square, so a(1) = 2.
CROSSREFS
KEYWORD
nonn,more,changed
AUTHOR
Justus Springer, Jul 26 2024
STATUS
approved