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%I #5 Sep 08 2022 08:45:53
%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