A062604 - OEIS

%I #23 Jul 04 2021 07:53:31

%S 3,379,383,1373,1609,24611,38281

%N Numbers k such that 38^k - 37^k is prime.

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

%C a(8) > 10^5. - _Robert Price_, Sep 03 2012

%o (PARI) is(n)=ispseudoprime(38^n-37^n) \\ _Charles R Greathouse IV_, Jun 12 2017

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

%K nonn,hard

%O 1,1

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

%E a(6) and a(7) from _Robert Price_, Sep 03 2012