id:A131556 - OEIS Search Results

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Period 6: repeat 1,-2,1,-1,2,-1.

+0
5

1, -2, 1, -1, 2, -1, 1, -2, 1, -1, 2, -1, 1, -2, 1, -1, 2, -1, 1, -2, 1, -1, 2, -1, 1, -2, 1, -1, 2, -1, 1, -2, 1, -1, 2, -1, 1, -2, 1, -1, 2, -1, 1, -2, 1, -1, 2, -1, 1, -2, 1, -1, 2, -1, 1, -2, 1, -1, 2, -1, 1, -2, 1, -1, 2, -1, 1, -2, 1, -1, 2, -1, 1, -2, 1, -1, 2, -1, 1, -2, 1, -1, 2, -1, 1, -2, 1, -1, 2, -1, 1, -2, 1, -1, 2, -1 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`a(n)=(1/6){-2(n mod 6)+3[(n+1) mod 6]-3[(n+2) mod 6]+2[(n+3) mod 6]-3[(n+4) mod 6]+3*[(n+5) mod 6]}, with n>=0. - Paolo P. Lava (ppl(AT)spl.at), Aug 28 2007` `G.f.: (x-1)^2/(x+1)/(x^2-x+1). - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Nov 14 2007`
	CROSSREFS	`Adjacent sequences: A131553 A131554 A131555 this_sequence A131557 A131558 A131559` `Sequence in context: A122876 A100063 A132419 this_sequence A107751 A132367 A101825`
	KEYWORD	`sign`
	AUTHOR	`Paul Curtz (bpcrtz(AT)free.fr), Aug 27 2007`
	EXTENSIONS	`Edited by njas, Sep 15 2007`

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Last modified May 16 23:01 EDT 2008. Contains 139884 sequences.

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