id:A117848 - OEIS Search Results

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Least K such that K*p(n)#-1 is the first of twin primes and 2*(K*p(n)#-1)+1 is prime, so K*p(n)#-1 is the first of twin primes and a Sophie Germain prime.

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2, 1, 1, 2, 5, 9, 17, 11, 4, 16, 61, 118, 141, 680, 37, 430, 401, 576, 885, 953, 358, 1857, 1376, 91, 798, 209, 3014, 5707, 2327, 3013, 923, 9437, 403, 9392, 356, 3161, 266, 2012, 2796, 4095, 6362, 3008, 12227, 18277, 25353, 3682, 18414, 21783, 1889 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`22-1 = 3, 3 5 twin primes and 23+1=7 prime, 3 first of twin prime and a Sophie Germain prime too`
	CROSSREFS	`Sequence in context: A127568 A143364 A029937 this_sequence A025242 A113186 A123218` `Adjacent sequences: A117845 A117846 A117847 this_sequence A117849 A117850 A117851`
	KEYWORD	`nonn`
	AUTHOR	`Pierre CAMI (pierrecami(AT)tele2.fr), May 01 2006`

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Last modified November 18 20:14 EST 2008. Contains 147244 sequences.

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