id:A112746 - OEIS Search Results

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Least k such that 6*k*p(n)^2 -1 and 6*k*p(n)^2 +1 are twin primes where p(i)=i-th prime.

+0
3

3, 2, 1, 3, 2, 2, 2, 20, 22, 2, 12, 10, 28, 32, 8, 7, 20, 15, 15, 12, 5, 3, 68, 15, 33, 12, 10, 3, 23, 28, 130, 8, 13, 32, 38, 7, 57, 3, 25, 3, 8, 18, 77, 12, 65, 22, 18, 18, 2, 10, 18, 30, 110, 10, 10, 28, 15, 22, 37, 7, 2, 10, 7, 8, 48, 3, 3, 87, 103, 128, 30, 13, 23, 127, 12, 15, 8, 3 (list; graph; listen)

	OFFSET	`1,1`
	MATHEMATICA	`Table[k = 1; While[c = 6kPrime[n]^2; ! PrimeQ[c - 1] \|\| ! PrimeQ[c + 1], k++ ]; k, {n, 80}] (Chandler)`
	CROSSREFS	`Cf. A112744, A112745.` `Sequence in context: A119910 A138034 A087818 this_sequence A107460 A128262 A140414` `Adjacent sequences: A112743 A112744 A112745 this_sequence A112747 A112748 A112749`
	KEYWORD	`nonn`
	AUTHOR	`Pierre CAMI (pierrecami(AT)tele2.fr), Sep 18 2005`
	EXTENSIONS	`Extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Oct 08 2005`

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Last modified July 23 17:35 EDT 2008. Contains 142285 sequences.

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