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A024904 Numbers n such that 7*n-5 is prime. 1
1, 4, 6, 12, 16, 22, 24, 28, 34, 46, 48, 52, 54, 58, 64, 66, 72, 78, 82, 94, 102, 108, 118, 124, 126, 132, 136, 148, 156, 162, 168, 174, 184, 186, 196, 198, 202, 204, 208, 214, 222, 232, 252, 256, 258, 268, 274, 286, 288, 292, 294, 298, 306, 312, 316, 318, 334, 336, 342, 346 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

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

MATHEMATICA

Select[Range[400], PrimeQ[7 # - 5] &] (* Vincenzo Librandi, Sep 26 2012 *)

PROG

(MAGMA) [n: n in [1..1000] |IsPrime(7*n-5)]; // Vincenzo Librandi, Nov 20 2010

(PARI) is(n)=isprime(7*n-5) \\ Charles R Greathouse IV, Jun 06 2017

CROSSREFS

Cf. A045392 (associated primes).

Sequence in context: A153355 A310597 A310598 * A172445 A274221 A139056

Adjacent sequences:  A024901 A024902 A024903 * A024905 A024906 A024907

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified August 24 18:12 EDT 2019. Contains 326295 sequences. (Running on oeis4.)