A106690 Numbers k such that 11*k - 97 is prime.

9, 10, 16, 18, 24, 28, 30, 34, 46, 48, 58, 60, 64, 70, 76, 78, 84, 94, 106, 108, 118, 120, 126, 136, 144, 148, 150, 154, 156, 160, 178, 186, 190, 198, 210, 226, 228, 234, 238, 240, 246, 256, 258, 268, 274, 276, 286, 294, 298, 300, 310, 324, 328, 330, 340, 346

Offset

1,1

Comments

11 and 97 are the smallest and largest of two-digit primes.

Links

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

Example

If k=9, then 11*k - 97 = 2 (prime).
If k=48, then 11*k - 97 = 431 (prime).

Mathematica

Select[Range[9, 350], PrimeQ[(11*# - 97)] &] (* Martin Ettl, Oct 21 2012 *)

Prog

(Magma) [n: n in [9..1000] | IsPrime(11*n - 97)] // Vincenzo Librandi, Nov 13 2010
(PARI) is(n)=isprime(11*n-97) \\ Charles R Greathouse IV, Jun 13 2017

Crossrefs

Cf. A105773, A105775.

Sequence in context: A105834 A280846 A121061 * A173015 A045568 A191380

Adjacent sequences: A106687 A106688 A106689 * A106691 A106692 A106693

Keyword

nonn,easy

Author

Parthasarathy Nambi, May 13 2005

Status

approved