A106009 Primes p such that 20*p - 3 and 20*p + 3 are both primes.

2, 5, 13, 23, 43, 61, 83, 89, 107, 173, 181, 223, 233, 313, 317, 349, 379, 467, 523, 659, 673, 727, 769, 811, 911, 971, 1009, 1051, 1069, 1097, 1153, 1279, 1321, 1433, 1451, 1549, 1559, 1583, 1693, 1777, 1861, 1993, 2029, 2063, 2137, 2213, 2267, 2357, 2441

Offset

1,1

Links

Michael De Vlieger, Table of n, a(n) for n = 1..10000

Mathematica

Select[Prime[Range[200]], PrimeQ[20#+3]&&PrimeQ[20#-3]&]

Prog

(Magma) [p: p in PrimesUpTo(2500) | IsPrime(20*p-3) and IsPrime(20*p+3)]; // Vincenzo Librandi, Nov 13 2010

Crossrefs

Sequence in context: A049779 A281906 A256491 * A194552 A079780 A178621

Adjacent sequences: A106006 A106007 A106008 * A106010 A106011 A106012

Keyword

nonn

Author

Zak Seidov, May 05 2005

Status

approved