A117847 - OEIS

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A117847

Numbers n such that A060256(n)*p(n)#-1 is a Sophie Germain prime.

10, 15, 24, 35, 37, 79, 340 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	COMMENTS	`This sequence gives first of twin primes which are also Sophie Germain primes`
	EXAMPLE	`16(29#)-1 is the first of twin primes, 16=A060256(10)` `2(16(29#)-1)+1 is prime so 16(29#)-1 is a Sophie Germain prime`
	CROSSREFS	`Cf. A060256.` `Sequence in context: A050200 A034961 A171444 * A057990 A173477 A091022` `Adjacent sequences: A117844 A117845 A117846 * A117848 A117849 A117850`
	KEYWORD	`hard,more,nonn`
	AUTHOR	`Pierre CAMI (pierre-cami(AT)bbox.fr), May 01 2006`

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Last modified February 15 14:37 EST 2012. Contains 205822 sequences.