The OEIS is supported by the many generous donors to the OEIS Foundation.
%I #16 Jul 04 2021 08:51:09
%S 3,59,3499,3571
%N Numbers k such that 63^k - 62^k is prime.
%C Terms greater than 1000 are often only strong pseudoprimes.
%C a(5) > 10^5. - _Robert Price_, Jun 05 2013
%o (PARI) is(n)=ispseudoprime(63^n-62^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