OFFSET
1,1
COMMENTS
Terms greater than 1000 may correspond to (unproven) strong pseudoprimes.
PROG
(PARI) is(n)=ispseudoprime(14^n-13^n) \\ Charles R Greathouse IV, Jun 13 2017
CROSSREFS
KEYWORD
nonn,hard,more
AUTHOR
Mike Oakes, May 18 2001, May 19 2001
EXTENSIONS
83869 found from Jean-Louis Charton, Sep 02 2009
Edited by M. F. Hasler, Sep 16 2013
STATUS
approved