The data contains exhaustive listings of nonisomorphic modular lattices (4-35 elements) and distributive lattices (4-60 elements), except for vertical sums and 2-sums. The lattices are stored in digraph6 format and compressed with xz. More details in file 00README.txt. The arXiv manuscript <https://arxiv.org/abs/2007.03232> describes how the data were created. Program code is available at <https://bitbucket.org/jkohonen/cartesian-lattice-counting/>.

2021