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A006430 Tree-rooted planar maps.
(Formerly M4036)
+0
1
0, 5, 360, 7350, 73700, 474588, 2292790, 9046807, 30676440, 92393015 (list; graph; listen)
OFFSET

1,2

REFERENCES

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

Walsh, T. R. S.; Lehman, A. B.; Counting rooted maps by genus. III: Nonseparable maps. J. Combinatorial Theory Ser. B 18 (1975), 222-259.

CROSSREFS

Sequence in context: A158105 A006108 A061456 this_sequence A007667 A121668 A160193

Adjacent sequences: A006427 A006428 A006429 this_sequence A006431 A006432 A006433

KEYWORD

nonn

AUTHOR

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

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Last modified December 19 12:50 EST 2009. Contains 171053 sequences.


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