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A172410 Numbers k such that 2k + 9 and 2k + 27 are prime. 0
1, 2, 5, 7, 10, 16, 17, 22, 26, 31, 35, 37, 40, 50, 52, 61, 65, 70, 77, 82, 85, 86, 92, 101, 107, 112, 115, 121, 127, 142, 152, 161, 170, 185, 187, 196, 206, 211, 215, 217, 220, 226, 241, 247, 257, 280, 295, 296, 302, 316, 317, 325, 332, 337, 341, 346, 350, 362, 365 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..59.

EXAMPLE

a(1)=1 because 2*1+9=11 and 2*1+27=29 are both prime.

PROG

(MAGMA) [n: n in [0..1000] |IsPrime(2*n+9) and IsPrime(2*n+27)] // Vincenzo Librandi, Dec 06 2010

CROSSREFS

Sequence in context: A080180 A159942 A102339 * A266594 A103871 A068817

Adjacent sequences:  A172407 A172408 A172409 * A172411 A172412 A172413

KEYWORD

nonn,easy,less

AUTHOR

Juri-Stepan Gerasimov, Feb 02 2010

EXTENSIONS

Corrected and extended by Vincenzo Librandi and Charles R Greathouse IV, Mar 24 2010

STATUS

approved

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Last modified June 30 02:06 EDT 2022. Contains 354913 sequences. (Running on oeis4.)