id:A131017 - OEIS Search Results

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Period 6 sequence (1, 1, 2, -1, 2, 1).

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

	OFFSET	`0,3`
	FORMULA	`\|a(n)\| = A131718(n).` `a(n) = A131717(n+1) - A131717(n).` `O.g.f.: (1+x+2x^2-x^3+2x^4+x^5)/[(1-x)(1+x)(x^2+x+1)(x^2-x+1)]. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jul 07 2008` `a(n)=(1/30){2(n mod 6)+7[(n+1) mod 6]-13[(n+2) mod 6]+17[(n+3) mod 6]-3[(n+4) mod 6]+2*[(n+5) mod 6]}, with n>=0. - Paolo P. Lava (ppl(AT)spl.at), Oct 10 2007`
	CROSSREFS	`Sequence in context: A080215 A060500 A131718 this_sequence A049046 A003647 A084217` `Adjacent sequences: A131014 A131015 A131016 this_sequence A131018 A131019 A131020`
	KEYWORD	`sign,easy,new`
	AUTHOR	`Paul Curtz (bpcrtz(AT)free.fr), Sep 23 2007`
	EXTENSIONS	`Edited by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jul 07 2008`

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Last modified July 23 17:35 EDT 2008. Contains 142285 sequences.

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