id:A083663 - OEIS Search Results

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Least k such that k*n!-1 is prime.

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3, 2, 1, 1, 2, 1, 1, 5, 3, 4, 4, 1, 5, 1, 2, 9, 2, 30, 30, 5, 44, 2, 7, 13, 5, 3, 11, 2, 14, 1, 7, 1, 1, 30, 16, 22, 36, 1, 38, 13, 22, 6, 36, 17, 36, 40, 31, 25, 38, 13, 4, 32, 22, 154, 10, 27, 7, 121, 9, 33, 19, 19, 4, 26, 100, 18, 46, 75, 21, 11, 34, 75, 38, 7, 45, 3, 19, 13, 59, 39, 72 (list; graph; listen)

	OFFSET	`1,1`
	PROGRAM	`(PARI) a(n)=if(n<1, 0, k=1; while(isprime(k*n!-1)==0, k++); k)`
	CROSSREFS	`Cf. A084730.` `Sequence in context: A027082 A140736 A140056 this_sequence A085427 A083716 A010268` `Adjacent sequences: A083660 A083661 A083662 this_sequence A083664 A083665 A083666`
	KEYWORD	`nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Jun 14 2003`

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Last modified December 9 18:50 EST 2009. Contains 170568 sequences.

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