A126612 - OEIS

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A126612

a(n) = least K such that K*6*M(n) - 1 and K*6*M(n) + 1 are twin primes, where M(n) = n-th Mersenne prime.

1, 1, 7, 24, 12, 52, 24, 39, 252, 112, 371, 184, 5772, 61939, 151505 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,3`
	EXAMPLE	`76(2^5-1)-1=1301 prime, 1301 and 1303 twin primes so K(3)=7 as M(3)=2^5-1`
	CROSSREFS	`Cf. A000043.` `Sequence in context: A129662 A012482 A124985 * A196113 A070410 A077035` `Adjacent sequences: A126609 A126610 A126611 * A126613 A126614 A126615`
	KEYWORD	`nonn`
	AUTHOR	`Pierre CAMI (pierre-cami(AT)bbox.fr), Feb 08 2007`

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Last modified February 14 23:53 EST 2012. Contains 205689 sequences.