A153146 - OEIS

A153146

Numbers n such that 2*n + 19 and 2*n - 19 are prime.

11, 12, 21, 24, 30, 39, 45, 54, 60, 66, 96, 105, 126, 129, 144, 156, 165, 189, 201, 210, 219, 234, 240, 261, 264, 291, 294, 306, 336, 360, 369, 396, 420, 429, 450, 474, 486, 495, 501, 516, 525, 534, 555, 591, 606, 639, 651, 654, 690, 714, 726, 735, 756, 765

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OFFSET

1,1

LINKS

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

MATHEMATICA

Select[Range[7, 4000], PrimeQ[2 # - 19] && PrimeQ[2 # + 19] &] (* Vincenzo Librandi, Oct 20 2012 *)

PROG

(Magma) [n: n in [7..900] | IsPrime(2*n - 19) and IsPrime(2*n + 19)]; // Vincenzo Librandi, Oct 20 2012

CROSSREFS

Cf. A153041, A097932, A153143.

Sequence in context: A303446 A350672 A107478 * A132359 A131363 A089185

Adjacent sequences: A153143 A153144 A153145 * A153147 A153148 A153149

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Dec 19 2008

STATUS

approved