%I

%S 2,53,2417

%N Primes of the form 7^n+2^n

%o (MAGMA) [ a: n in [0..2100] | IsPrime(a) where a is 7^n+2^n ]

%K nonn,bref

%O 1,1

%A _Vincenzo Librandi_, Apr 29 2010