id:A105439 - OEIS Search Results

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a(n) = the smallest prime p such that p+2 and q+2 are prime; q is the n-th prime after p.

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4

3, 5, 3, 5, 3, 17, 5, 3, 59, 5, 3, 11, 17, 5, 3, 29, 5, 3, 17, 41, 11, 41, 5, 3, 5, 3, 137, 11, 71, 5, 3, 5, 3, 17, 29, 11, 71, 5, 3, 5, 3, 5, 3, 11, 17, 5, 3, 137, 5, 3, 41, 11, 17, 5, 3, 41, 5, 3, 11, 227, 5, 3, 71, 11, 137, 5, 3, 41, 71, 41, 29, 59, 29, 17, 179, 11, 191, 5, 3, 5, 3 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`a(2)=5 because 5+2 and 11+2 are primes.`
	CROSSREFS	`Cf. A105443, A105444, A105445.` `Sequence in context: A103506 A094929 A096634 this_sequence A020765 A112756 A121795` `Adjacent sequences: A105436 A105437 A105438 this_sequence A105440 A105441 A105442`
	KEYWORD	`nonn`
	AUTHOR	`Cino Hilliard (hillcino368(AT)gmail.com), May 02 2005`
	EXTENSIONS	`Edited by Don Reble (djr(AT)nk.ca), Jun 11 2007`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

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