id:A036250 - OEIS Search Results

Search: id:A036250

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Number of trees of nonempty sets with n points. (Each node is a set of 1 or more points.)

+0
3

1, 1, 2, 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	`0,3`
	LINKS	`Index entries for sequences related to trees`
	FORMULA	`G.f. B(x)-B^2(x)/2+B(x^2)/2, where B(x) is g.f. for A036249.`
	CROSSREFS	`Essentially the same as A036251. Cf. A000055, A038052.` `Sequence in context: A000642 A035083 A113822 this_sequence A006660 A123777 A090828` `Adjacent sequences: A036247 A036248 A036249 this_sequence A036251 A036252 A036253`
	KEYWORD	`nonn`
	AUTHOR	`Christian G. Bower (bowerc(AT)usa.net), Nov 15 1998.`

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Last modified November 30 22:12 EST 2008. Contains 150989 sequences.

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