id:A132677 - OEIS Search Results

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Triperiodic or period 3: repeat 1, 2, -3.

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1, 2, -3, 1, 2, -3, 1, 2, -3, 1, 2, -3, 1, 2, -3, 1, 2, -3, 1, 2, -3, 1, 2, -3, 1, 2, -3, 1, 2, -3, 1, 2, -3, 1, 2, -3, 1, 2, -3, 1, 2, -3, 1, 2, -3, 1, 2, -3, 1, 2, -3, 1, 2, -3, 1, 2, -3, 1, 2, -3, 1, 2, -3, 1, 2, -3, 1, 2, -3, 1, 2, -3, 1, 2, -3, 1, 2, -3, 1, 2, -3, 1, 2, -3, 1, 2, -3, 1, 2, -3, 1, 2, -3, 1, 2, -3, 1, 2, -3 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`Sequence proportional to its 6n-th differences.` `a(n)=(1/3){-4(n mod 3)+5[(n+1) mod 3]-[(n+2) mod 3]} - Paolo P. Lava (ppl(AT)spl.at), Nov 30 2007` `G.f.: (1+3x)/(1+x+x^2) [From Jaume Oliver Lafont (joliverlafont(AT)gmail.com), Mar 24 2009]`
	PROGRAM	`(PARI) a(n)=[1, 2, -3][1+n%3] [From Jaume Oliver Lafont (joliverlafont(AT)gmail.com), Mar 24 2009]`
	CROSSREFS	`Cf. A049347, A000748, A101544.` `Sequence in context: A073645 A082846 A117373 this_sequence A010882 A106590 A054073` `Adjacent sequences: A132674 A132675 A132676 this_sequence A132678 A132679 A132680`
	KEYWORD	`sign`
	AUTHOR	`Paul Curtz (bpcrtz(AT)free.fr), Nov 15 2007`

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Last modified November 27 14:50 EST 2009. Contains 167570 sequences.

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