id:A031148 - OEIS Search Results

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Number of series-reduced planted trees with n leaves of 2 colors and no symmetries.

+0
3

2, 1, 2, 5, 14, 43, 138, 455, 1540, 5305, 18546, 65616, 234546, 845683, 3072350, 11235393, 41326470, 152793376, 567518950, 2116666670, 7924062430, 29765741831, 112157686170, 423809991041, 1605622028100 (list; graph; listen)

	OFFSET	`1,1`
	LINKS	`N. J. A. Sloane, Transforms` `Index entries for sequences related to rooted trees`
	FORMULA	`Doubles (index 2+) under WEIGH transform.`
	CROSSREFS	`Essentially the same as A052301. Cf. A000669, A001678, A038075, A050381.` `Sequence in context: A160457 A107087 A115141 this_sequence A032238 A000619 A006602` `Adjacent sequences: A031145 A031146 A031147 this_sequence A031149 A031150 A031151`
	KEYWORD	`nonn,eigen`
	AUTHOR	`Christian G. Bower (bowerc(AT)usa.net)`

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.

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