OFFSET
1,1
COMMENTS
Terms greater than 1000 are often only strong pseudoprimes.
a(8) > 10^5. - Robert Price, Sep 03 2012
PROG
(PARI) is(n)=ispseudoprime(38^n-37^n) \\ Charles R Greathouse IV, Jun 12 2017
CROSSREFS
KEYWORD
nonn,hard
AUTHOR
Mike Oakes, May 18 2001, May 19 2001
EXTENSIONS
a(6) and a(7) from Robert Price, Sep 03 2012
STATUS
approved