id:A033932 - OEIS Search Results

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Least positive a(n) such that n!+a(n) is prime.

+0
3

1, 1, 1, 1, 5, 7, 7, 11, 23, 17, 11, 1, 29, 67, 19, 43, 23, 31, 37, 89, 29, 31, 31, 97, 131, 41, 59, 1, 67, 223, 107, 127, 79, 37, 97, 61, 131, 1, 43, 97, 53, 1, 97, 71, 47, 239, 101, 233, 53, 83, 61, 271, 53, 71, 223, 71, 149, 107, 283, 293, 271, 769, 131, 271 (list; graph; listen)

	OFFSET	`0,5`
	COMMENT	`Conjecture: No term is a composite number. a(n)is a prime > 3*prime(k) where prime(k) < n = < prime(k+1). - Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Apr 07 2004`
	LINKS	`T. D. Noe, Table of n, a(n) for n=0..500` `Index entries for sequences related to factorial numbers`
	PROGRAM	`(PARI) for(n=0, 70, k=1; while(!isprime(n!+k), k++); print1(k, ", "))`
	CROSSREFS	`Cf. A033933.` `Adjacent sequences: A033929 A033930 A033931 this_sequence A033933 A033934 A033935` `Sequence in context: A078496 A143699 A114521 this_sequence A126992 A028316 A019163`
	KEYWORD	`nice,nonn`
	AUTHOR	`Jeff Burch (gburch(AT)erols.com)`
	EXTENSIONS	`More terms from Jud McCranie (j.mccranie(AT)comcast.net). a(21) onwards from wouter.meeussen(AT)pandora.be. Better description from Rick L. Shepherd (rshepherd2(AT)hotmail.com), Nov 06 2002`

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Last modified October 13 02:37 EDT 2008. Contains 145008 sequences.

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