id:A036256 - OEIS Search Results

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Sum(binomial(i,floor(i/2)),i=0..n).

+0
5

1, 2, 4, 7, 13, 23, 43, 78, 148, 274, 526, 988, 1912, 3628, 7060, 13495, 26365, 50675, 99295, 191673, 376429, 729145, 1434577, 2786655, 5490811, 10691111, 21091711, 41150011, 81266611, 158825371, 313942891, 614483086, 1215563476 (list; graph; listen)

	OFFSET	`0,2`
	REFERENCES	`L. H. Harper, Optimal numberings and isoperimetric problems on graphs, J. Comb. Th. 1 (1966), 385-393.`
	FORMULA	`G.f.=2/[(1-z)(1-2z+sqrt(1-4z^2)]. - Emeric Deutsch (deutsch(AT)duke.poly.edu), Nov 25 2003`
	CROSSREFS	`Partial sums of A001405.` `Sequence in context: A048888 A026724 A054163 this_sequence A093629 A018182 A005595` `Adjacent sequences: A036253 A036254 A036255 this_sequence A036257 A036258 A036259`
	KEYWORD	`nonn`
	AUTHOR	`njas`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

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