OFFSET
1,2
COMMENTS
PROG
(Magma) [n: n in [0..7000000]| IsPrime(1+n) and IsPrime(1+n^2) and IsPrime(1+n^4) and IsPrime(1+n^16)]; // Vincenzo Librandi, Apr 11 2011
CROSSREFS
KEYWORD
nonn
AUTHOR
Zak Seidov, Apr 09 2011
EXTENSIONS
a(1) = 1 prepended by Vincenzo Librandi, Apr 11 2011
STATUS
approved