id:A113194 - OEIS Search Results

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Numbers n such that Lucas(n)-Lucas(i) is composite for i=0..n-3.

+0
9

5, 7, 10, 17, 19, 23, 29, 31, 34, 41, 44, 49, 53, 55, 57, 62, 67, 68, 71, 75, 77, 79, 80, 87, 89, 93, 98, 100, 101, 103, 107, 109, 110, 116, 122, 124, 125, 133, 134, 135, 136, 143, 147, 154, 155, 160, 161, 164, 167, 170, 173, 177, 180, 184, 185, 188, 190, 194, 196 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`These are the n such that A113193(n)=0.`
	MATHEMATICA	`lst={}; Do[i=0; While[i<n-2 && !PrimeQ[Lucas[n]-Lucas[i]], i++ ]; If[i==n-2, AppendTo[lst, n]], {n, 3, 250}]; lst`
	CROSSREFS	`Cf. A113192 (primes that are the difference of two Lucas numbers).` `Sequence in context: A133756 A048584 A073895 this_sequence A088768 A131998 A015849` `Adjacent sequences: A113191 A113192 A113193 this_sequence A113195 A113196 A113197`
	KEYWORD	`nonn`
	AUTHOR	`T. D. Noe (noe(AT)sspectra.com), Oct 17 2005`

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Last modified August 29 17:54 EDT 2008. Contains 143238 sequences.

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