id:A090704 - OEIS Search Results

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Numbers n such that n*factorial(n)-1 is prime.

+0
3

2, 3, 5, 7, 8, 11, 27, 77, 98, 183, 285, 290, 397, 410, 599, 717, 731, 888, 1962, 2239, 2241, 2532 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`a(n)=A049433(n)-1 because n!-(n-1)!-1=(n-1)*(n-1)!-1`
	CROSSREFS	`Adjacent sequences: A090701 A090702 A090703 this_sequence A090705 A090706 A090707` `Sequence in context: A060634 A026401 A069353 this_sequence A112055 A076386 A073301`
	KEYWORD	`nonn`
	AUTHOR	`mohammed bouayoun (bouyao(AT)wanadoo.fr), Jan 15 2004`
	EXTENSIONS	`More terms from Farideh Firoozbakht (f.firoozbakht(AT)math.ui.ac.ir), Oct 31 2004`

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Last modified October 13 09:05 EDT 2008. Contains 145008 sequences.