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A306837
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Number of unimodular n X n matrices with elements {0, 1}.
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2
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OFFSET
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1,2
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COMMENTS
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An integer matrix is unimodular if its determinant is -1 or +1.
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LINKS
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CROSSREFS
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Number of different values taken by the determinant is in A089472.
A363862 gives equivalence classes up to row and column permutation.
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KEYWORD
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nonn,more,hard
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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