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Search: id:A006385
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| A006385 |
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Number of connected planar maps with n edges.
(Formerly M1279)
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+0
2
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| 1, 2, 4, 14, 52, 248, 1416, 9172, 66366, 518868, 4301350, 37230364, 333058463, 3057319072, 28656583950, 273298352168, 2645186193457, 25931472185976
(list; graph; listen)
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OFFSET
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0,2
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REFERENCES
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Walsh, T. R. S.; Generating nonisomorphic maps without storing them. SIAM J. Algebraic Discrete Methods 4 (1983), no. 2, 161-178.
T. R. S. Walsh, personal communication.
Wormald, Nicholas C. Counting unrooted planar maps. Discrete Math. 36 (1981), no. 2, 205-225.
V. A. Liskovets, A reductive technique for enumerating nonisomorphic planar maps, Discr. Math., v.156 (1996), 197-217.
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CROSSREFS
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Cf. A090376.
Sequence in context: A003500 A129876 A038055 this_sequence A047990 A000939 A109154
Adjacent sequences: A006382 A006383 A006384 this_sequence A006386 A006387 A006388
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KEYWORD
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nonn,nice
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AUTHOR
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njas
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