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A129732
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Number of main classes of Graeco-Latin squares of order n. That is, species of pairs of orthogonal Latin squares.
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5
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OFFSET
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3,5
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LINKS
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EXAMPLE
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The unique example for n=3 has two Latin squares [[0, 2, 1], [2, 1, 0], [1, 0, 2]] and [[0, 2, 1], [1, 0, 2], [2, 1, 0]].
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CROSSREFS
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KEYWORD
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hard,more,nice,nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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