A106088 Primes p such that 7*p + 6 and 6*p + 7 are primes.

5, 11, 31, 61, 71, 109, 199, 229, 241, 269, 281, 379, 389, 419, 431, 499, 541, 571, 631, 641, 709, 739, 809, 1049, 1061, 1069, 1091, 1231, 1259, 1289, 1291, 1429, 1439, 1451, 1489, 1499, 1571, 1601, 1621, 1831, 1861, 1931, 1949, 2011, 2069, 2089, 2099, 2239

Offset

1,1

Links

Table of n, a(n) for n=1..48.

Mathematica

Select[Prime[Range[220]], PrimeQ[6#+7]&&PrimeQ[7#+6]&]

Prog

(Magma) [p: p in PrimesUpTo(10000)| IsPrime(7*p+6) and IsPrime(6*p+7)]; // Vincenzo Librandi, Nov 13 2010

Crossrefs

Sequence in context: A280081 A057470 A038580 * A246010 A077446 A023276

Adjacent sequences: A106085 A106086 A106087 * A106089 A106090 A106091

Keyword

nonn

Author

Zak Seidov, May 07 2005

Extensions

More terms from Vincenzo Librandi, Apr 01 2010

Status

approved