A075996 - OEIS

%I #22 Sep 08 2022 08:45:07

%S 7,37,277,10301051460914430942120966371077,

%T 599003433304810403471724557167760804513610446042757207757

%N Primes of the form 2 + 2^n + 3^n.

%H Charles R Greathouse IV, <a href="/A075996/b075996.txt">Table of n, a(n) for n = 1..7</a>

%o (Magma) [ a: n in [0..250] | IsPrime(a) where a is 2+2^n+3^n ]; // _Vincenzo Librandi_, Dec 16 2010

%o (PARI) for(n=1, 100, if(ispseudoprime(t=3^n+2^n+2), print1(t", "))) \\ _Charles R Greathouse IV_, Jun 08 2016

%Y Cf. A076513, A173657.

%K nonn

%O 1,1

%A _Zak Seidov_, Oct 17 2002