OFFSET
1,1
LINKS
C. Pomerance, Science News reference.
EXAMPLE
For x = 2 abs(7^2-2^11) = 1999 which is prime. So 2 is the first entry.
PROG
(PARI) g(n) = for(x=1, n, y=abs(7^x-2^11); if(ispseudoprime(y), print1(x", ")))
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Cino Hilliard, Sep 23 2006
STATUS
approved