A036251 - OEIS

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A036251

Number of trees with 2-colored leaves.

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; refs; listen; history; internal format)

	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 * A176022 A113031 A127582` `Adjacent sequences: A036248 A036249 A036250 * A036252 A036253 A036254`
	KEYWORD	`nonn`
	AUTHOR	`Christian G. Bower (bowerc(AT)usa.net), Nov 15 1998.`

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Last modified February 16 18:54 EST 2012. Contains 205939 sequences.