A155188 Sophie Germain primes that are also strong primes and lesser of twin prime pairs.

11, 29, 41, 179, 191, 239, 281, 419, 431, 641, 659, 809, 1019, 1031, 1049, 1229, 1289, 1451, 1481, 1931, 2129, 2141, 2339, 2549, 2969, 3299, 3329, 3359, 3389, 3539, 3821, 3851, 4019, 4271, 4481, 5231, 5279, 5441, 5501, 5639, 5741, 5849, 6131, 6269, 6449

Offset

1,1

Links

Amiram Eldar, Table of n, a(n) for n = 1..10000

Mathematica

lst={}; Do[p0=Prime[n]; p1=Prime[n+1]; p2=Prime[n+2]; If[p1>(p0+p2)/2, If[PrimeQ[p1*2+1], If[PrimeQ[p1+2], AppendTo[lst, p1]]]], {n, 7!}]; lst

Crossrefs

Cf. A045536, A005384, A051634, A006562, A051635.

Sequence in context: A106065 A247089 A156110 * A045469 A219790 A249436

Adjacent sequences: A155185 A155186 A155187 * A155189 A155190 A155191

Keyword

nonn

Author

Vladimir Joseph Stephan Orlovsky, Jan 21 2009

Status

approved