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A055545
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Number of unlabeled matroids on n points.
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6
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OFFSET
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0,2
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COMMENTS
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This is the total number of pairwise non-isomorphic (i.e., "unlabeled") matroids on n points, with no restrictions on loops, parallel elements etc.
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REFERENCES
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J. G. Oxley, Matroid Theory. Oxford, England: Oxford University Press, 1993. See p. 473.
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LINKS
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Eric Weisstein's World of Mathematics, Matroid.
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CROSSREFS
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KEYWORD
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nonn,nice,more
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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