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A006302
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Related to enumeration of rooted maps.
(Formerly M3622)
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1
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OFFSET
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2,1
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COMMENTS
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It would be nice to have a more precise definition for this ancient sequence from the Walsh-Lehman paper. - N. J. A. Sloane, Jun 05 2017
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REFERENCES
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N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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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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