A024907 Numbers k such that 9*k - 7 is prime.

1, 2, 4, 6, 10, 12, 16, 20, 22, 26, 30, 32, 36, 40, 44, 50, 52, 54, 64, 66, 72, 74, 76, 92, 94, 96, 102, 104, 106, 110, 114, 122, 124, 130, 132, 136, 144, 146, 152, 160, 162, 166, 170, 174, 180, 186, 192, 202, 206, 212, 220, 226, 230, 232, 234, 240, 246, 250, 256, 260, 262, 270

Offset

1,2

Links

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

Mathematica

Select[Range[300], PrimeQ[9 # - 7] &] (* Harvey P. Dale, Sep 18 2012 *)

Prog

(Magma) [n: n in [1..300] |IsPrime(9*n-7)]; // Vincenzo Librandi, Nov 20 2010
(PARI) is(n)=isprime(9*n-7) \\ Charles R Greathouse IV, May 22 2017

Crossrefs

Cf. A061238 (associated primes).

Sequence in context: A072752 A036634 A005942 * A033098 A220478 A033868

Adjacent sequences: A024904 A024905 A024906 * A024908 A024909 A024910

Keyword

nonn,easy

Author

Clark Kimberling

Status

approved