A274505 Primes p such that 3*p-10 and 3*p+10 are prime numbers.

7, 11, 17, 19, 23, 31, 47, 61, 67, 89, 101, 107, 109, 137, 151, 163, 199, 283, 347, 353, 373, 397, 401, 409, 431, 439, 457, 479, 487, 523, 577, 607, 619, 641, 647, 661, 691, 761, 787, 809, 907, 929, 1033, 1087, 1103, 1153, 1201, 1229, 1307, 1319

Offset: 1

Author

Vincenzo Librandi, Jun 30 2016

Keywords

• nonn
• easy

Comments

Intersection of A023211 and A230227.

Examples

			7 is a term because 3*7-10 = 11 and 3*7+10 = 31 are primes.
		

Links

• Vincenzo Librandi, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A023211, A164568, A230227.

Programs

Magma

[p: p in PrimesUpTo(1500) |IsPrime(3*p-10) and IsPrime(3*p+10)];

Mathematica

Select[Prime[Range[400]], PrimeQ[3 # - 10] && PrimeQ[3 # + 10] &]