id:A119336 - OEIS Search Results

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A119336

Expansion of (1-x)^4/((1-x)^6-x^6).

+0
2

1, 2, 3, 4, 5, 6, 8, 16, 45, 130, 341, 804, 1730, 3460, 6555, 12016, 21845, 40410, 77540, 155080, 320001, 669526, 1398101, 2884776, 5858126, 11716252, 23166783, 45536404, 89478485, 176565486, 350739488, 701478976, 1410132405, 2841788170 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`Row sums of A119335. Binomial transform of (1+x)/(1-x)^6.`
	FORMULA	`a(n)=sum{k=0..n, sum{j=0..n-k, C(k,3j)C(n-k,3j)}}`
	CROSSREFS	`Adjacent sequences: A119333 A119334 A119335 this_sequence A119337 A119338 A119339` `Sequence in context: A048318 A037402 A048332 this_sequence A133706 A081710 A128421`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), May 14 2006`

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Last modified October 13 17:46 EDT 2008. Contains 145008 sequences.

AT&T Labs Research