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A274135 Numbers n such that 6^n + 5^(n+1) is prime. 0

%I

%S 1,4,6,9,12,15,18,21,34,36,75,102,231,256,309,513,748,3789,12378,36378

%N Numbers n such that 6^n + 5^(n+1) is prime.

%C a(21) > 10^5.

%t Select[Range[0,100000], PrimeQ[6^n + 5^(n + 1)] &]

%o (PARI) is(n)=ispseudoprime(6^n + 5^(n+1)) \\ _Charles R Greathouse IV_, Jun 10 2016

%o (PFGW) ABC2 6^$a + 5^($a+1)

%o a: from 1 to 100000

%o _Charles R Greathouse IV_, Jun 10 2016

%Y Cf. A093765.

%K nonn,more

%O 1,2

%A _Robert Price_, Jun 10 2016

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Last modified May 25 13:00 EDT 2022. Contains 354071 sequences. (Running on oeis4.)