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A062629
Numbers k such that 63^k - 62^k is prime.
0
3, 59, 3499, 3571
OFFSET
1,1
COMMENTS
Terms greater than 1000 are often only strong pseudoprimes.
a(5) > 10^5. - Robert Price, Jun 05 2013
PROG
(PARI) is(n)=ispseudoprime(63^n-62^n) \\ Charles R Greathouse IV, Jun 13 2017
KEYWORD
nonn,hard
AUTHOR
Mike Oakes, May 18 2001, May 19 2001
STATUS
approved