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A006420
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Number of rooted planar maps.
(Formerly M5012)
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0
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1, 16, 150, 1104, 7077, 41504, 228810, 1205520, 6135690, 30391520, 147277676, 700990752
(list; graph; refs; listen; history; internal format)
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OFFSET
| 2,2
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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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CROSSREFS
| Sequence in context: A155657 A135458 A000486 * A049351 A023014 A073384
Adjacent sequences: A006417 A006418 A006419 * A006421 A006422 A006423
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KEYWORD
| nonn,more
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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