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A307519
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a(n) is the number of canonical polygons with 4n edges having exactly 4 lines of reflection symmetry.
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8
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2, 1, 2, 6, 10, 17, 34, 72, 142, 288, 585, 1195, 2413, 4898
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OFFSET
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1,1
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LINKS
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CROSSREFS
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KEYWORD
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nonn,more
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AUTHOR
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STATUS
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approved
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