OFFSET
1,1
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..1000
FORMULA
p, 2p-15 and 2p+15 all are positive and are primes (hence we omit p=2).
MATHEMATICA
Select[Range[11, 2000], PrimeQ[ # ] && PrimeQ[2# + 15] && PrimeQ[2# - 15] &]
Select[Prime[Range[2, 250]], And@@PrimeQ[2#+{15, -15}]&] (* Harvey P. Dale, May 21 2013 *)
PROG
(Magma) [p: p in PrimesUpTo(3200)| IsPrime(2*p+15) and IsPrime(2*p-15) ]; // Vincenzo Librandi, Jan 28 2011
CROSSREFS
KEYWORD
nonn
AUTHOR
Zak Seidov, Feb 16 2005
STATUS
approved