id:A055335 - OEIS Search Results

Search: id:A055335

Displaying 1-1 of 1 results found.

page 1

Number of asymmetric (identity) trees with n nodes and 4 leaves.

+0
2

1, 3, 8, 14, 25, 40, 62, 89, 127, 173, 233, 304, 393, 497, 624, 769, 942, 1139, 1369, 1627, 1925, 2257, 2635, 3053, 3524, 4042, 4621, 5253, 5954, 6717, 7557, 8466, 9462, 10536, 11706, 12963, 14326, 15786, 17363, 19046, 20857, 22786, 24854 (list; graph; listen)

	OFFSET	`9,2`
	LINKS	`Index entries for sequences related to trees`
	FORMULA	`G.f.: x^9(-x^3+2x^2+x+1)/[(1+x^2)(1-x^3)(1-x^2)^2(1-x)^2].`
	CROSSREFS	`Column 4 of A055334.` `Sequence in context: A135940 A126430 A082474 this_sequence A123329 A129067 A005735` `Adjacent sequences: A055332 A055333 A055334 this_sequence A055336 A055337 A055338`
	KEYWORD	`nonn`
	AUTHOR	`Christian G. Bower (bowerc(AT)usa.net), May 12 2000`

page 1

Search completed in 0.002 seconds

Last modified August 29 17:54 EDT 2008. Contains 143238 sequences.

AT&T Labs Research