A106080 - OEIS

A106080

Primes p such that 5*p+8 and 8*p+5 are primes.

3, 7, 13, 19, 43, 103, 127, 211, 223, 241, 283, 349, 397, 421, 439, 727, 733, 787, 829, 853, 883, 1597, 1723, 1741, 1777, 2017, 2131, 2287, 2371, 2383, 2521, 2593, 2833, 2857, 3163, 3181, 3253, 3319, 3571, 3583, 3697, 3853, 3919, 3967, 4003, 4021, 4201

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

OFFSET

1,1

LINKS

Table of n, a(n) for n=1..47.

FORMULA

A023220 INTERSECT A023230. - R. J. Mathar, Aug 06 2009

MATHEMATICA

Select[Prime[Range[220]], PrimeQ[8#+5]&&PrimeQ[5#+8]&]

PROG

(Magma) [p: p in PrimesUpTo(10000)| IsPrime(5*p+8) and IsPrime(8*p+5)] // Vincenzo Librandi, Nov 13 2010

CROSSREFS

Sequence in context: A134765 A023230 A194581 * A187819 A310266 A330407

Adjacent sequences: A106077 A106078 A106079 * A106081 A106082 A106083

KEYWORD

nonn

AUTHOR

Zak Seidov, May 07 2005

EXTENSIONS

More terms from Vincenzo Librandi, Apr 01 2010

STATUS

approved