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 A288794 Numbers k such that Lucas(k) + prime(k) is a prime. 1
 1, 6, 12, 18, 54, 75, 354, 10158, 23280, 33726, 38226, 70749, 244779, 308604 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS a(15) > 500000. LINKS EXAMPLE a(1) = 1 because Lucas(1)=1, prime(1)=2 and 1+2=3 is a prime. a(2) = 6 because Lucas(6)=18, prime(6)=13 and 18+13=31 is a prime. MATHEMATICA Select[Range[1000], PrimeQ[LucasL[#] + Prime[#]] &] PROG (MAGMA) [n: n in [1..950] | IsPrime(Lucas(n)+NthPrime(n))]; CROSSREFS Cf. A000032, A000040, A050180. Sequence in context: A067143 A206038 A205859 * A177708 A344177 A100357 Adjacent sequences:  A288791 A288792 A288793 * A288795 A288796 A288797 KEYWORD nonn,more AUTHOR Vincenzo Librandi, Jun 16 2017 EXTENSIONS a(8)-a(12) from Robert Price, Oct 26 2017 a(13)-a(14) from Robert Price, Dec 16 2017 STATUS approved

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Last modified August 13 18:03 EDT 2022. Contains 356107 sequences. (Running on oeis4.)