A089509 - OEIS

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A089509

a(n)=Kronecker(7/n).

1, 1, 1, 1, -1, 1, 0, 1, 1, -1, -1, 1, -1, 0, -1, 1, -1, 1, 1, -1, 0, -1, -1, 1, 1, -1, 1, 0, 1, -1, 1, 1, -1, -1, 0, 1, 1, 1, -1, -1, -1, 0, -1, -1, -1, -1, 1, 1, 0, 1, -1, -1, 1, 1, 1, 0, 1, 1, 1, -1, -1, 1, 0, 1, 1, -1, -1, -1, -1, 0, -1, 1, -1, 1, 1, 1, 0, -1, -1, -1, 1, -1, 1, 0, 1, -1, 1, -1, -1, -1, 0, -1, 1, 1, -1, 1, -1, 0, -1, 1, -1, -1, 1, -1, 0, 1 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	FORMULA	`if n==0 (mod 7) a(n)=0; for p in=A003632 a(p)=-1; for p in A038878 a(p)=+1`
	PROG	`(PARI) a(n)=kronecker(7, n)`
	CROSSREFS	`Cf. A091338, A080891.` `Sequence in context: A152904 A071033 A118102 * A157972 A124897 A071035` `Adjacent sequences: A089506 A089507 A089508 * A089510 A089511 A089512`
	KEYWORD	`sign`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Jan 03 2004`

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Last modified February 16 07:32 EST 2012. Contains 205874 sequences.