A007859 - OEIS

This site is supported by donations to The OEIS Foundation.

A007859

Number of matchings in rooted plane trees on n nodes.

0, 1, 4, 18, 84, 405, 2002, 10101, 51844, 269994, 1423784, 7590044, 40846390, 221650195, 1211606190 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,3`
	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: A086405 A151251 A010849 * A185132 A085923 A110166` `Adjacent sequences: A007856 A007857 A007858 * A007860 A007861 A007862`
	KEYWORD	`nonn`
	AUTHOR	`Martin Klazar (klazar(AT)kam.mff.cuni.cz)`

Content is available under The OEIS End-User License Agreement .

Last modified February 15 12:04 EST 2012. Contains 205782 sequences.