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A006680
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Number of binary phylogenetic trees with n labels.
(Formerly M4427)
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1
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1, 1, 7, 45, 465, 5775, 88515, 1588545, 32852925, 768242475, 20053670175, 577971719325, 18230691904425, 624676513836375, 23106221910646875, 917643290676737625, 38944796393877499125, 1759004961887566267875
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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2,3
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REFERENCES
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Foulds, L. R.; Robinson, R. W. Enumeration of binary phylogenetic trees. Combinatorial mathematics, VIII (Geelong, 1980), pp. 187-202, Lecture Notes in Math., 884, Springer, Berlin-New York, 1981. Math. Rev. 83a:05071.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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LINKS
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FORMULA
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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