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A181593
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Number of isomorphism classes of self-orthogonal Latin squares of order n.
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0
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OFFSET
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1,4
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COMMENTS
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A self-orthogonal Latin square (SOLS) is a Latin square orthogonal to its transpose. Two SOLS L and L' are isomorphic if a permutation applied to the rows, columns and symbols of L maps L to L'.
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LINKS
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CROSSREFS
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KEYWORD
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hard,more,nonn
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AUTHOR
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EXTENSIONS
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a(10) from Martin Kidd, Oct 20 2011
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STATUS
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approved
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