A107305 Numbers k such that 11*k - 13 is prime.

4, 6, 10, 16, 22, 24, 30, 36, 42, 60, 64, 70, 76, 84, 90, 94, 100, 102, 106, 120, 126, 132, 136, 142, 144, 150, 160, 172, 174, 184, 192, 196, 210, 214, 226, 232, 244, 246, 256, 270, 274, 276, 280, 282, 294, 304, 316, 322, 330, 340, 346, 354, 360, 366, 370, 372

Offset: 1

Author

Parthasarathy Nambi, May 20 2005

Keywords

• nonn
• easy

Comments

11 and 13 are twin primes.

All terms must be even. - Harvey P. Dale, Jul 29 2016

Examples

			If k=4, then 11*k - 13 = 31 (prime).
If k=60, then 11*k - 13 = 647 (prime).
		

Links

• Daniel Starodubtsev, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A141856 (the resulting primes).

Programs

Magma

[n: n in [2..100000] | IsPrime(11*n - 13)]; // Vincenzo Librandi, Nov 13 2010

Mathematica

Select[Range[2,400,2],PrimeQ[11#-13]&] (* Harvey P. Dale, Jul 29 2016 *)

PARI

is(n)=isprime(11*n-13) \\ Charles R Greathouse IV, Jun 13 2017