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Search: id:A000184
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| A000184 |
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Number of rooted planar maps with n edges.
(Formerly M2128 N0843)
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+0
2
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| 2, 22, 164, 1030, 5868, 31388, 160648, 795846, 3845020, 18211380, 84876152, 390331292, 1775032504
(list; graph; listen)
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OFFSET
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2,1
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REFERENCES
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Tutte, W. T.; On the enumeration of planar maps. Bull. Amer. Math. Soc. 74 1968 64-74.
T. R. S. Walsh, Combinatorial Enumeration of Non-Planar Maps. Ph.D. Dissertation, Univ. of Toronto, 1971.
T. R. S. Walsh and A. B. Lehman, Counting rooted maps by genus, J. Comb. Thy B13 (1972), 122-141 and 192-218.
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FORMULA
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Appears to be 2 * A029887(n). - R. Stephan, Aug 17 2004
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CROSSREFS
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Adjacent sequences: A000181 A000182 A000183 this_sequence A000185 A000186 A000187
Sequence in context: A084399 A123960 A091169 this_sequence A007613 A043037 A058441
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KEYWORD
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nonn
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AUTHOR
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njas
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