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.
2, 15, 131, 1369, 13842, 129185, 1104895, 8750964, 64714465, 450686225, 2976189422
Offset: 1
Examples
For n = 1, only the square itself and the standard triangle are contained in the square, so a(1) = 2.
Links
- Gavin Brown and Alexander M. Kasprzyk, Small polygons and toric codes, J. Symbolic Comput. 51 (2013), pp. 55-62.
- Justus Springer, RationalPolygons.jl (Version 1.0.0) [Computer software], 2024.
- Justus Springer and Martin Bohnert, Classifying rational polygons with small denominator and few interior lattice points, arxiv:2410.17244 [math.CO], 2024.
- Justus Springer and Martin Bohnert, Lattice subpolygons of a square with given sidelength (1.0.0) [Data set], 2024.