id:A135279 - OEIS Search Results

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Smallest k such that x^k is (+1 or -1) mod p for all nonzero x relatively prime to p, where p=prime(n)=A000040(n).

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1, 2, 2, 3, 5, 6, 8, 9, 11, 14, 15 (list; graph; listen)

	OFFSET	`1,2`
	FORMULA	`maybe a(1)=1 a(2)=2, a(n)=f(n-1) where f is A005097.`
	EXAMPLE	`a(6)=6 because X^6 (mod 13) is +-1.`
	CROSSREFS	`Cf. A009057.` `Cf. A002322, A005097.` `Adjacent sequences: A135276 A135277 A135278 this_sequence A135280 A135281 A135282` `Sequence in context: A096981 A035541 A060966 this_sequence A035631 A050046 A052337`
	KEYWORD	`more,nonn`
	AUTHOR	`Masahiko Shin (qqbf2msd(AT)etude.ocn.ne.jp), Dec 02 2007`
	EXTENSIONS	`Edited by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jan 30 2008`

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Last modified October 6 15:49 EDT 2008. Contains 144667 sequences.