A112550 - OEIS

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A112550

Define a(1)=41; then a(n)=k*a(n-1)^2-1 with k least number such that a(n) and a(n)+2 are twin primes.

41, 282407, 99054112352057, 29847243642863658530046303259457, 438302112913620818033722039251417607232953642602702120391887945707 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	EXAMPLE	`168*41^2-1=282407, 282407 and 282409 are twin primes so a(2)=282407`
	CROSSREFS	`See k sequence in A112551` `Sequence in context: A176132 A185539 A078813 * A114927 A087512 A125194` `Adjacent sequences: A112547 A112548 A112549 * A112551 A112552 A112553`
	KEYWORD	`nonn`
	AUTHOR	`Pierre CAMI (pierre-cami(AT)bbox.fr), Sep 13 2005`

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Last modified February 17 00:09 EST 2012. Contains 205978 sequences.