OFFSET
1,1
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..1000
MATHEMATICA
Select[Prime[Range[220]], PrimeQ[10#+1]&&PrimeQ[1#+10]&]
Select[Prime[Range[500]], AllTrue[{10#+1, #+10}, PrimeQ]&] (* The program uses the AllTrue function from Mathematica version 10 *) (* Harvey P. Dale, Jun 15 2017 *)
PROG
(Magma) [p: p in PrimesUpTo(100000)| IsPrime(p+10) and IsPrime(10*p+1)]; // Vincenzo Librandi, Nov 13 2010
CROSSREFS
KEYWORD
nonn
AUTHOR
Zak Seidov, May 07 2005
STATUS
approved