OFFSET
1,1
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..1000
FORMULA
MATHEMATICA
Select[Prime[Range[400]], PrimeQ[4#+3]&&PrimeQ[4#-3]&]
Select[Prime[Range[600]], AllTrue[4#+{3, -3}, PrimeQ]&] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Feb 18 2021 *)
PROG
(Magma) [p: p in PrimesUpTo(100000)| IsPrime(4*p-3) and IsPrime(4*p+3)]; // Vincenzo Librandi, Nov 13 2010
CROSSREFS
KEYWORD
nonn
AUTHOR
Zak Seidov, May 05 2005
STATUS
approved