OFFSET
1,1
COMMENTS
All terms are odd.
a(28) > 50000. - Robert Price, Sep 04 2015
EXAMPLE
9 is in the sequence because 9!! - 2^9 = 433 is prime.
MATHEMATICA
Select[Range[0, 50000], #!! - 2^# > 0 && PrimeQ[#!! - 2^#] &] (* Robert Price, Sep 04 2015 *)
CROSSREFS
KEYWORD
more,nonn
AUTHOR
Farideh Firoozbakht, Nov 27 2006
EXTENSIONS
Three more terms from Ryan Propper, Nov 05 2007
a(21)-a(27) from Robert Price, Sep 04 2015
STATUS
approved