Abstract.
The correct values for the number of all unlabeled lattices on n elements are known for \( n \leq 11 \). We present a fast orderly algorithm generating all unlabeled lattices up to a given size n. Using this algorithm, we have computed the number of all unlabeled lattices as well as that of all labeled lattices on an n-element set for each \( n \leq 18 \).
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Received April 4, 2000; accepted in final form November 2, 2001.
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ID="h1" Presented by R. Freese.
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Heitzig, J., Reinhold, J. Counting Finite Lattices. Algebra univers. 48, 43–53 (2002). https://doi.org/10.1007/PL00013837
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DOI: https://doi.org/10.1007/PL00013837