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A153146 Numbers n such that 2*n + 19 and 2*n - 19 are prime. 1
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 (list; graph; refs; listen; history; text; internal format)
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: A066686 A125887 A107478 * A132359 A131363 A089185

Adjacent sequences:  A153143 A153144 A153145 * A153147 A153148 A153149

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Dec 19 2008

STATUS

approved

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Last modified December 13 16:57 EST 2017. Contains 295959 sequences.