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A057408
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Number of self-avoiding polygons of area n with 3 (self-avoiding polygon) holes on square lattice (not allowing rotations).
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1
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10, 212, 2530, 22640, 169906, 1131904, 6920388, 39668532, 216315230, 1133876128, 5757104542, 28478125312, 137854314576, 655307492388, 3067528095994, 14171567365156, 64732059542906, 292778085749036
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OFFSET
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18,1
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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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