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A106009
Primes p such that 20*p - 3 and 20*p + 3 are both primes.
1
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
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
KEYWORD
nonn
AUTHOR
Zak Seidov, May 05 2005
STATUS
approved