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A007853 Maximal antichains in rooted plane trees on n nodes. +0
1
1, 2, 5, 15, 50, 178, 663, 2553, 10086, 40669, 166752, 693331, 2917088, 12398545, 53164201 (list; graph; listen)
OFFSET

1,2

REFERENCES

M. Klazar, Twelve countings with rooted plane trees, European Journal of Combinatorics 18 (1997), 195-210; Addendum, 18 (1997), 739-740.

LINKS

Index entries for sequences related to rooted trees

CROSSREFS

Sequence in context: A024718 A149951 A157135 this_sequence A149952 A060049 A107590

Adjacent sequences: A007850 A007851 A007852 this_sequence A007854 A007855 A007856

KEYWORD

nonn

AUTHOR

Martin Klazar (klazar(AT)kam.mff.cuni.cz)

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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