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Search: id:A007171
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| A007171 |
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Q-graphs with 2n edges.
(Formerly M1296)
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+0
1
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OFFSET
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1,2
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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).
R. C. Read, On the enumeration of a class of plane multigraphs, Aequat. Math., 31 (1986), 47-63.
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CROSSREFS
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Sequence in context: A000831 A000090 A013115 this_sequence A058136 A156335 A026089
Adjacent sequences: A007168 A007169 A007170 this_sequence A007172 A007173 A007174
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KEYWORD
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nonn,more
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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