

A290246


Prime numbers that are common indices to both prime Lucas and prime Wagstaff numbers.


0



5, 7, 11, 13, 17, 19, 31, 61, 79, 313, 10691
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OFFSET

1,1


COMMENTS

Prime numbers p such that Lucas(p) and (2^p + 1)/3 are both primes.
Intersection of A000978 and A001606.


LINKS

Table of n, a(n) for n=1..11.


MATHEMATICA

seq = {}; wagstaff[n_] := (2^n + 1)/3; Do[p = Prime[n]; If[PrimeQ[LucasL[p]] && PrimeQ[wagstaff[p]], AppendTo[seq, p]], {n, 1, 1304}]; seq


CROSSREFS

Cf. A000978, A001606, A080327.
Sequence in context: A314296 A141639 A232558 * A024891 A277907 A136144
Adjacent sequences: A290243 A290244 A290245 * A290247 A290248 A290249


KEYWORD

hard,nonn,more


AUTHOR

Amiram Eldar, Jul 24 2017


STATUS

approved



