id:A133186 - OEIS Search Results

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Period 4: repeat 1, 2, 1, -4.

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1, 2, 1, -4, 1, 2, 1, -4, 1, 2, 1, -4, 1, 2, 1, -4, 1, 2, 1, -4, 1, 2, 1, -4, 1, 2, 1, -4, 1, 2, 1, -4, 1, 2, 1, -4, 1, 2, 1, -4, 1, 2, 1, -4, 1, 2, 1, -4, 1, 2, 1, -4, 1, 2, 1, -4, 1, 2, 1, -4, 1, 2, 1, -4, 1, 2, 1, -4, 1, 2, 1, -4, 1, 2, 1, -4 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`a(n)=(1/4){-5(n mod 4)+5[(n+1) mod 4]+[(n+2) mod 4]-[(n+3) mod 4]}, with n>=0 - Paolo P. Lava (ppl(AT)spl.at), Oct 24 2007` `a(n)=-[(3/2)I]I^n+(-1)^n+[(3/2)I](-I)^n, with n>=0 and I=sqrt(-1) - Paolo P. Lava (ppl(AT)spl.at), Jul 17 2008` `G.f.: 1/(1+x)+3x/(1+x^2). a(n)=(-1)^n+3A056594(n-1). [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Oct 30 2008]`
	CROSSREFS	`Cf. A109008.` `Sequence in context: A086256 A057550 A059150 this_sequence A084236 A068057 A003484` `Adjacent sequences: A133183 A133184 A133185 this_sequence A133187 A133188 A133189`
	KEYWORD	`sign`
	AUTHOR	`Paul Curtz (bpcrtz(AT)free.fr), Oct 07 2007`

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Last modified December 4 20:00 EST 2008. Contains 151309 sequences.

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