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A275924
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Number of connected arrangements of n circles in the affine plane, in the sense that the union of the boundaries of the circles is a connected set.
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24
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OFFSET
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0,4
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COMMENTS
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Arrangements in A250001 that are connected, in the sense that the union of the (boundaries of the) circles is a connected set. See A250001, the main entry for this problem, for further information.
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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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EXTENSIONS
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STATUS
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approved
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