id:A117522 - OEIS Search Results

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Numbers n such that L(2*n + 1) is prime where L(m) is the Lucas number.

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2, 3, 5, 6, 8, 9, 15, 18, 20, 23, 26, 30, 35, 39, 56 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`If n=56 then L(2*n + 1) is a prime with twenty four digits.`
	CROSSREFS	`Cf. A000032.` `Sequence in context: A058588 A035399 A063756 this_sequence A028374 A050578 A028776` `Adjacent sequences: A117519 A117520 A117521 this_sequence A117523 A117524 A117525`
	KEYWORD	`nonn`
	AUTHOR	`Parthasarathy Nambi (PachaNambi(AT)yahoo.com), Apr 26 2006`

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