OFFSET
1,1
MATHEMATICA
Select[Prime[Range[220]], PrimeQ[20#+1]&&PrimeQ[1#+20]&]
PROG
(Magma) [p: p in PrimesUpTo(10000)| IsPrime(p+20) and IsPrime(20*p+1)] // Vincenzo Librandi, Nov 13 2010
CROSSREFS
KEYWORD
nonn
AUTHOR
Zak Seidov, May 07 2005
EXTENSIONS
More terms from Vincenzo Librandi, Apr 01 2010
STATUS
approved