A134696 Numbers n such that n*Lucas(n) + 1 is prime.

1, 2, 3, 4, 6, 10, 42, 48, 56, 66, 70, 86, 108, 126, 134, 214, 248, 459, 1479, 1722, 3076, 5064, 5102, 7602

Offset

1,2

Links

Table of n, a(n) for n=1..24.

Example

If n=1 then n*Lucas(n) + 1 = 2 (prime).
If n=66 then n*Lucas(n) + 1 = 4099474525767589 (prime).

Mathematica

Select[Range[9000], PrimeQ[# LucasL[#]+1]&] (* Harvey P. Dale, Nov 10 2011 *)

Crossrefs

Cf. A134313, A134580, A000032.

Sequence in context: A355191 A093912 A181054 * A151677 A304872 A255921

Adjacent sequences: A134693 A134694 A134695 * A134697 A134698 A134699

Keyword

nonn

Author

Parthasarathy Nambi, Jan 27 2008

Extensions

More terms from Harvey P. Dale, Nov 10 2011

Status

approved