id:A034299 - OEIS Search Results

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Alternating sum transform (PSumSIGN) of A000975.

+0
3

1, 1, 4, 6, 15, 27, 58, 112, 229, 453, 912, 1818, 3643, 7279, 14566, 29124, 58257, 116505, 233020, 466030, 932071, 1864131, 3728274, 7456536, 14913085, 29826157, 59652328, 119304642, 238609299 (list; graph; listen)

	OFFSET	`0,3`
	LINKS	`N. J. A. Sloane, Transforms`
	FORMULA	`a(n)=sum{k=0..floor(n/2), A001045(n-2k+1)} - Paul Barry (pbarry(AT)wit.ie), Nov 24 2003` `G.f.: (1/(1-x^2))/(1-x-2x^2); a(n)=sum{k=0..n+1, A001045(k)*(1-(-1)^floor((n+k)/2))}; - Paul Barry (pbarry(AT)wit.ie), Apr 16 2005` `a(n)=Sum_{k, 0<=k<=n}A126258(n,k). - Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Mar 13 2007`
	CROSSREFS	`Adjacent sequences: A034296 A034297 A034298 this_sequence A034300 A034301 A034302` `Sequence in context: A027631 A128620 A045907 this_sequence A007135 A073603 A064910`
	KEYWORD	`nonn`
	AUTHOR	`njas`

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Last modified October 7 14:39 EDT 2008. Contains 144666 sequences.

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