A062615 - OEIS

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A062615

Numbers k such that 49^k - 48^k is prime.

%I #17 Jul 04 2021 08:43:29

%S 2,3,7,379

%N Numbers k such that 49^k - 48^k is prime.

%C Terms greater than 1000 are often only strong pseudoprimes.

%C a(5) > 10^5. - _Robert Price_, Dec 03 2012

%o (PARI) is(n)=ispseudoprime(49^n-48^n) \\ _Charles R Greathouse IV_, Jun 13 2017

%Y Cf. A000043, A057468, A059801, A059802, A062572-A062666.

%K nonn,hard

%O 1,1

%A _Mike Oakes_, May 18 2001, May 19 2001