id:A091338 - OEIS Search Results

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a(n) = (3/n), where (k/n) is the Kronecker symbol.

+0
2

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

	OFFSET	`1,1`
	LINKS	`Eric Weisstein's World of Mathematics, Kronecker Symbol`
	FORMULA	`If n==0 (mod 3) a(n)=0; for p ==1 or 11 (mod 12) (i.e. p>3 in A038874), a(p)=+1; for p==2, 5 or 7 (mod 12) (i.e. p in A038875), a(p)=-1 - Benoit Cloitre (benoit7848c(AT)orange.fr), Jan 03 2004`
	PROGRAM	`(PARI) a(n)=kronecker(3, n)`
	CROSSREFS	`Sequence in context: A117441 A049347 A010892 this_sequence A016345 A016148 A016333` `Adjacent sequences: A091335 A091336 A091337 this_sequence A091339 A091340 A091341`
	KEYWORD	`sign`
	AUTHOR	`Eric Weisstein (eric(AT)weisstein.com), Dec 30, 2003`
	EXTENSIONS	`More terms from Benoit Cloitre (benoit7848c(AT)orange.fr), Jan 03 2004`

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Last modified December 13 23:45 EST 2009. Contains 170824 sequences.

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