id:A105443 - OEIS Search Results

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a(n) = the smallest prime p such that p+4 and q+4 are prime; q is the n-th prime after p.

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3, 67, 3, 43, 3, 37, 7, 79, 3, 19, 3, 13, 19, 7, 13, 3, 7, 13, 3, 7, 79, 3, 43, 3, 37, 3, 79, 3, 19, 67, 13, 673, 7, 229, 3, 79, 13, 127, 7, 79, 3, 79, 7, 43, 3, 37, 3, 43, 97, 19, 163, 13, 127, 7, 43, 3, 37, 7, 97, 3, 19, 3, 13, 97, 7, 19, 3, 13, 19, 7, 13, 3, 7, 277, 3, 19, 37, 13 (list; graph; listen)

	OFFSET	`2,1`
	EXAMPLE	`a(2)=3 because 3+4 and 7+4 are primes.`
	CROSSREFS	`Cf. A105439, A105444, A105445.` `Sequence in context: A091470 A028567 A003359 this_sequence A065425 A096482 A139868` `Adjacent sequences: A105440 A105441 A105442 this_sequence A105444 A105445 A105446`
	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 July 26 23:19 EDT 2008. Contains 142293 sequences.

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