A081713 - OEIS

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A081713

n! - n# - 1 is prime, where n# is the primorial function.

4, 5, 20, 92, 106, 266, 308, 343, 583, 597, 903, 1021, 1239, 1314, 2458, 6160, 9627, 10649 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	COMMENTS	`Some of the larger entries may only correspond to probable primes.`
	LINKS	`Mike Oakes, Primo-factorials` `Joe McLean, Interesting Sources of Probable Primes`
	EXAMPLE	`a(1)=4 because 4!-4#-1=17 is prime`
	CROSSREFS	`Sequence in context: A119283 A151499 A057781 * A120697 A135964 A099578` `Adjacent sequences: A081710 A081711 A081712 * A081714 A081715 A081716`
	KEYWORD	`nonn`
	AUTHOR	`Mike Oakes (mikeoakes2(AT)aol.com), Apr 04 2003`
	EXTENSIONS	`More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 03 2008`

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Last modified February 15 09:26 EST 2012. Contains 205753 sequences.