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A365650
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Number of free n-polyominoids, allowing both corner- and edge-connections.
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5
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OFFSET
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1,2
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COMMENTS
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These structures could be called polypletoids (or pseudo-polyominoids), because they are related to polyplets (polyominoids) as polyominoids (pseudo-polyominoes) are related to polyominoes.
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LINKS
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CROSSREFS
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KEYWORD
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nonn,hard,more
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AUTHOR
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STATUS
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approved
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