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A214821
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Number of genus 0 unsensed hypermaps with n darts.
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5
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1, 3, 6, 20, 57, 240, 954, 4566, 22641, 121823, 683307, 4004055
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,2
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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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