id:A131554 - OEIS Search Results

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Period 5: repeat 1 1 -1 1 -1.

+0
1

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

	OFFSET	`0,1`
	FORMULA	`a(n)=(1/50){-19(n mod 5)+21[(n+1) mod 5]-19[(n+2) mod 5]+21*[(n+3) mod 5]+[(n+4) mod 5]}, with n>=0 - Paolo P. Lava (ppl(AT)spl.at), Aug 28 2007` `G.f.: (-1-x+x^2-x^3+x^4)/(x-1)/(1+x+x^2+x^3+x^4). - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Nov 14 2007`
	CROSSREFS	`Sequence in context: A016030 A127252 A121238 this_sequence A070748 A108784 A010555` `Adjacent sequences: A131551 A131552 A131553 this_sequence A131555 A131556 A131557`
	KEYWORD	`sign`
	AUTHOR	`Paul Curtz (bpcrtz(AT)free.fr), Aug 26 2007`

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Last modified July 26 23:19 EDT 2008. Contains 142293 sequences.

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