OFFSET
1,3
LINKS
Carlos Rivera, Puzzle 403. 833021343, The Prime Puzzles and Problems Connection.
EXAMPLE
a(14)=4503 because 4^k + 4503 is prime for each k in 1..14 and there is no smaller number with this property.
CROSSREFS
KEYWORD
nonn,hard,more
AUTHOR
Farideh Firoozbakht, May 30 2007, Jun 04 2007
EXTENSIONS
More terms from Jens Kruse Andersen, Jun 08 2007
STATUS
approved