OFFSET
1,1
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..100
MATHEMATICA
Select[15*Range[10^8], And @@ PrimeQ /@ ({2, 4, 8, 16, 32, 64, 128, 256}*# + 1) &] (* Ray Chandler, Nov 21 2006 *)
Select[15*Range[83*10^6], AllTrue[#*2^Range[8]+1, PrimeQ]&] (* The program uses the AllTrue function from Mathematica version 10 *) (* Harvey P. Dale, Feb 23 2020 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Artur Jasinski, Nov 02 2006
EXTENSIONS
Extended by Ray Chandler, Nov 21 2006
STATUS
approved