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A006394
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Number of connected planar maps with n nodes and without loops or parallel edges.
(Formerly M2498)
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0
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1, 1, 3, 5, 15, 52, 213, 1002, 5167, 27967, 158447, 926786
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,3
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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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EXTENSIONS
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STATUS
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approved
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