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A357536
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Number of colorings of an n X n grid with at most n interchangeable colors under rotational and reflectional symmetry.
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4
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OFFSET
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1,2
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REFERENCES
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F. Harary and E. Palmer, Graphical Enumeration, Academic Press, 1973.
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LINKS
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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