id:A087419 - OEIS Search Results

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Consider pairs (p,k) such that p is a prime, q and r are the two primes following p, 0<k<q, and k*primorial(p)+q and k*primorial(p)+r are consecutive primes; sequence gives values of k.

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1, 1, 2, 4, 1, 2, 3, 4, 2, 3, 5, 7, 10, 6, 7, 12, 8, 10, 9, 16, 23, 8, 13, 30, 40, 13, 20, 25, 27, 33, 27, 29, 20, 8, 29, 66, 37, 52, 8, 44, 71, 99, 47, 79, 59, 105, 104, 60, 106, 12, 13, 50, 121, 173, 167, 3, 49, 34, 7, 42, 42, 182, 107, 53, 157, 197, 314, 8, 335, 211, 273, 229 (list; graph; listen)

	OFFSET	`1,3`
	EXAMPLE	`a(8)=4 because A087418(8)=5; 4(235)+7 and 4(235)+11 are consecutive primes.`
	CROSSREFS	`Cf. A002110, A087418.` `Sequence in context: A133902 A054708 A112229 this_sequence A050979 A053450 A124911` `Adjacent sequences: A087416 A087417 A087418 this_sequence A087420 A087421 A087422`
	KEYWORD	`nonn`
	AUTHOR	`Pierre CAMI (colettecami(AT)aol.com), Oct 22 2003`
	EXTENSIONS	`Edited by Don Reble (djr(AT)nk.ca), Nov 09 2005`

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Last modified September 7 15:23 EDT 2008. Contains 143483 sequences.

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