id:A113240 - OEIS Search Results

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Expansion of (1/(1-x))*sum(k>=2,x^k/(1-2x^k)).

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1, 2, 5, 6, 13, 14, 25, 30, 49, 50, 97, 98, 165, 186, 325, 326, 621, 622, 1161, 1230, 2257, 2258, 4481, 4498, 8597, 8858, 17125, 17126, 34077, 34078, 66985, 68014, 133553, 133634, 267057, 267058, 529205, 533306, 1058261, 1058262, 2115133 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`a(n)=sum{k=0..floor(n/2), floor((n-k+1)/(k+1))*2^k}.`
	CROSSREFS	`Cf. A002541.` `Sequence in context: A069480 A100613 A070911 this_sequence A098376 A028259 A027010` `Adjacent sequences: A113237 A113238 A113239 this_sequence A113241 A113242 A113243`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Oct 19 2005`

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Last modified December 16 17:18 EST 2009. Contains 170825 sequences.

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