id:A131118 - OEIS Search Results

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a(4n)=-n^2, a(4n+1)=n^2, a(4n+2)=1-n^2, a(4n+3)=n(n+1).

+0
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0, 0, 1, 0, -1, 1, 0, 2, -4, 4, -3, 6, -9, 9, -8, 12, -16, 16, -15, 20, -25, 25, -24, 30, -36, 36, -35, 42, -49, 49, -48, 56 (list; graph; listen)

	OFFSET	`0,8`
	CROSSREFS	`Sequence in context: A135359 A072872 A098217 this_sequence A140765 A097541 A079560` `Adjacent sequences: A131115 A131116 A131117 this_sequence A131119 A131120 A131121`
	KEYWORD	`sign`
	AUTHOR	`Paul Curtz (bpcrtz(AT)free.fr), Sep 24 2007`

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Last modified December 3 01:16 EST 2008. Contains 151161 sequences.