A153767 - OEIS

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A153767

Primes p such that 8*p - 9 is also prime.

2, 5, 7, 11, 17, 29, 31, 47, 59, 61, 109, 131, 137, 139, 167, 179, 181, 197, 199, 229, 251, 269, 277, 281, 307, 337, 347, 367, 379, 397, 419, 421, 449, 467, 479, 491, 521, 557, 599, 601, 619, 631, 641, 647, 661, 677, 691, 719, 727, 739, 757, 761, 769, 787, 797

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..3000

EXAMPLE

For p=31 (a prime), 8*p - 9 = 239 is also prime, so 31 is in the sequence.

MATHEMATICA

Select[Prime[Range[150]], PrimeQ[8 # - 9]&] (* Vincenzo Librandi, Apr 04 2013 *)

PROG

(Magma) [p: p in PrimesUpTo(1000) | IsPrime(8*p-9)]; // Vincenzo Librandi, Apr 04 2013

CROSSREFS