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A006468
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Number of rooted planar maps.
(Formerly M3984)
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1
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5, 37, 150, 449, 1113, 2422, 4788, 8790, 15213, 25091, 39754, 60879
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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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.
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LINKS
| Plouffe, Simon, Master Thesis S. Plouffe Master thesis, UQAM, 1992 on the arXiv site.
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FORMULA
| G.f.: -(x^3-4*x^2+2*x+5)/(x-1)^7, conjectured in S. Plouffe Master thesis, 1992.
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CROSSREFS
| Sequence in context: A089195 A201119 A023289 * A144954 A146195 A095924
Adjacent sequences: A006465 A006466 A006467 * A006469 A006470 A006471
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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