id:A036251 - OEIS Search Results

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Number of trees with 2-colored leaves.

+0
3

1, 2, 3, 3, 7, 14, 35, 85, 231, 633, 1845, 5461, 16707, 51945, 164695, 529077, 1722279, 5664794, 18813369, 62996850, 212533226, 721792761, 2466135375, 8471967938, 29249059293, 101440962296, 353289339927, 1235154230060 (list; graph; listen)

	OFFSET	`0,2`
	LINKS	`Index entries for sequences related to trees`
	FORMULA	`G.f.: B(x)+B(x)^2/2+B(x^2)/2-B(x)*(B(x)-x). B(x) is g.f. for A029856.`
	CROSSREFS	`Essentially the same as A036250. Cf. A038054.` `Sequence in context: A129012 A136122 A121875 this_sequence A113031 A127582 A096714` `Adjacent sequences: A036248 A036249 A036250 this_sequence A036252 A036253 A036254`
	KEYWORD	`nonn`
	AUTHOR	`Christian G. Bower (bowerc(AT)usa.net), Nov 15 1998.`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

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