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A358698
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Number of self-avoiding closed paths in the 7 X n grid graph which pass through all vertices on four (left, right, upper, lower) sides of the graph.
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3
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1, 21, 408, 6410, 113748, 2002405, 35669433, 633099244, 11240647480, 199480271184, 3540336868535, 62831861216325, 1115122033297714, 19790829247392636, 351241699540793996, 6233729269914805533, 110634310753645173365, 1963503651093439655818, 34847658208568166865562, 618465506517313482341986
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OFFSET
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2,2
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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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