A124850 Primes p=n/2 such that 7n+3 and 3n+7 are primes.

2, 5, 11, 17, 29, 37, 61, 67, 71, 89, 167, 191, 199, 229, 269, 277, 311, 331, 337, 347, 379, 389, 419, 431, 509, 541, 577, 587, 617, 631, 691, 709, 757, 797, 809, 821, 929, 941, 977, 991, 1069, 1091, 1117, 1129, 1217, 1277, 1279, 1289, 1291, 1367, 1439

Offset: 1

Author

Zak Seidov, Nov 10 2006

Keywords

• nonn

Links

• Harvey P. Dale, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A089033, A089953, A124849.

Programs

Mathematica

Select[Prime[Range[250]],AllTrue[{14#+3,6#+7},PrimeQ]&] (* Harvey P. Dale, Mar 10 2022 *)