id:A131729 - OEIS Search Results

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Period 4: repeat 0, 1, -1, 1 .

+0
1

0, 1, -1, 1, 0, 1, -1, 1, 0, 1, -1, 1, 0, 1, -1, 1, 0, 1, -1, 1, 0, 1, -1, 1, 0, 1, -1, 1, 0, 1, -1, 1, 0, 1, -1, 1, 0, 1, -1, 1, 0, 1, -1, 1, 0, 1, -1, 1, 0, 1, -1, 1, 0, 1, -1, 1, 0, 1, -1, 1, 0, 1, -1, 1, 0, 1, -1, 1, 0, 1, -1, 1, 0, 1, -1, 1, 0, 1, -1, 1, 0, 1, -1, 1, 0, 1, -1, 1, 0, 1, -1, 1, 0, 1, -1, 1, 0, 1, -1, 1, 0, 1, -1, 1, 0, 1, -1, 1, 0, 1, -1, 1, 0, 1 (list; graph; listen)

	OFFSET	`0,1`
	FORMULA	`a(n)=(1/24){7(n mod 4)-11[(n+1) mod 4]+13[(n+2) mod 4]-5[(n+3) mod 4]}, with n>=0 - Paolo P. Lava (ppl(AT)spl.at), Oct 02 2007` `G.f.: -x(1-x+x^2)/(x-1)/(x+1)/(x^2+1). - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Nov 15 2007` `a(n) = 1/4+(1/2)cos(1/2Pin)+3/4(-1)^(1+n). - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Nov 15 2007` `a(n)=1/4+(1/4)I^n-(3/4)(-1)^n+(1/4)*(-I)^n, with n>=0 and I=sqrt(-1) - Paolo P. Lava (ppl(AT)spl.at), Jul 17 2008`
	CROSSREFS	`Sequence in context: A098725 A046978 A075553 this_sequence A115517 A022930 A068344` `Adjacent sequences: A131726 A131727 A131728 this_sequence A131730 A131731 A131732`
	KEYWORD	`sign`
	AUTHOR	`Paul Curtz (bpcrtz(AT)free.fr), Sep 17 2007`

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

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