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Search: id:A045738
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A045738 Branches in all noncrossing rooted trees on n nodes on a circle. +0
2
1, 4, 24, 148, 925, 5838, 37128, 237576, 1527867, 9867000, 63946740, 415683216, 2709186844, 17697136408, 115833872400, 759517409424, 4987999112007, 32804320226580, 216018805979760, 1424151150922500, 9398957079664845 (list; graph; listen)
OFFSET

2,2
LINKS

Index entries for sequences related to rooted trees

FORMULA

binomial(3n-3, n-2) - 2*binomial(3n-6, n-3)

CROSSREFS

Sequence in context: A077613 A072949 A104531 this_sequence A003288 A091166 A078108

Adjacent sequences: A045735 A045736 A045737 this_sequence A045739 A045740 A045741

KEYWORD

nonn

AUTHOR

Emeric Deutsch (deutsch(AT)duke.poly.edu)

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Last modified November 25 13:47 EST 2009. Contains 167481 sequences.

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