A111224 Numbers n such that 5*n + 7 is prime.

0, 2, 6, 8, 12, 18, 20, 24, 26, 30, 32, 38, 44, 50, 54, 60, 62, 66, 68, 72, 78, 90, 92, 96, 108, 110, 114, 116, 120, 122, 128, 134, 144, 150, 156, 158, 164, 170, 174, 176, 180, 186, 188, 192, 194, 198, 216, 218, 222, 236, 242, 246, 254, 258, 260, 264, 272, 284

Offset

1,2

Links

Table of n, a(n) for n=1..58.

Example

If n=108 then 5*n + 7 = 547 (prime).

Mathematica

Select[Range[0, 300], PrimeQ[5#+7]&] (* Harvey P. Dale, Jun 24 2018 *)

Prog

(Magma) [n: n in [0..300] | IsPrime(5*n+7)]; - Vincenzo Librandi, Sep 03 2010
(PARI) is(n)=isprime(5*n+7) \\ Charles R Greathouse IV, Jun 12 2017

Crossrefs

Cf. A024894, A087505, A024897, A081759.

Sequence in context: A111051 A077561 A008407 * A139718 A173340 A135311

Adjacent sequences: A111221 A111222 A111223 * A111225 A111226 A111227

Keyword

nonn,easy

Author

Parthasarathy Nambi, Oct 26 2005

Status

approved