OFFSET
1,1
LINKS
MATHEMATICA
Select[Table[7*2^n-1, {n, 0, 200}], PrimeQ] (* Jean-François Alcover, Mar 20 2011 *)
CROSSREFS
KEYWORD
nonn,nice
AUTHOR
N. J. A. Sloane, Dec 29 1999
EXTENSIONS
13 inserted by R. J. Mathar, Apr 01 2009
STATUS
approved