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A113194 Numbers n such that Lucas(n)-Lucas(i) is composite for i=0..n-3. 8
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; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

These are the n such that A113193(n)=0.

LINKS

Table of n, a(n) for n=1..59.

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: A314293 A073895 A320447 * A088768 A131998 A141443

Adjacent sequences:  A113191 A113192 A113193 * A113195 A113196 A113197

KEYWORD

nonn

AUTHOR

T. D. Noe, Oct 17 2005

STATUS

approved

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Last modified August 20 18:56 EDT 2019. Contains 326154 sequences. (Running on oeis4.)