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A006394 Number of connected planar maps with n nodes.
(Formerly M2498)
0
1, 1, 3, 5, 15, 52, 213, 1002 (list; graph; refs; listen; history; internal format)
OFFSET

1,3

REFERENCES

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

Walsh, T. R. S.; Generating nonisomorphic maps without storing them. SIAM J. Algebraic Discrete Methods 4 (1983), no. 2, 161-178.

CROSSREFS

Sequence in context: A103043 A018601 A190733 * A018650 A177814 A018702

Adjacent sequences:  A006391 A006392 A006393 * A006395 A006396 A006397

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

EXTENSIONS

Needs a better description!

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Last modified February 17 13:09 EST 2012. Contains 206029 sequences.