A049432 - OEIS

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A049432

Numbers n such that n!-(n-1)!+1 is prime.

2, 3, 4, 5, 6, 8, 13, 20, 24, 46, 59, 150, 152, 198, 683, 880, 1135, 1907, 6617, 10243 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	COMMENTS	`a(21) > 12000. [From Donovan Johnson (donovan.johnson(AT)yahoo.com), Dec 18 2009]`
	LINKS	`Index entries for sequences related to factorial numbers`
	EXAMPLE	`6!-(6-1)!+1 = 601 is prime.`
	CROSSREFS	`Cf. A049984, A049433.` `Sequence in context: A008537 A133430 A033071 * A102516 A156981 A039089` `Adjacent sequences: A049429 A049430 A049431 * A049433 A049434 A049435`
	KEYWORD	`nonn`
	AUTHOR	`Paul Jobling (paul.jobling(AT)whitecross.com)`
	EXTENSIONS	`More terms from Farideh Firoozbakht (f.firoozbakht(AT)sci.ui.ac.ir), Jul 18 2003` `a(17)-a(20) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Dec 18 2009`

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Last modified February 15 16:21 EST 2012. Contains 205823 sequences.