OFFSET
1,1
COMMENTS
For numbers k for which (7+k!)/7 is prime see A139065.
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..12
FORMULA
MATHEMATICA
a = {}; Do[If[PrimeQ[(n! + 7)/7], AppendTo[a, (n! + 7)/7]], {n, 1, 50}]; a
PROG
(PARI) for(k=7, 1e3, if(ispseudoprime(t=k!/7+1), print1(t", "))) \\ Charles R Greathouse IV, Jul 15 2011
CROSSREFS
KEYWORD
nonn
AUTHOR
Artur Jasinski, Apr 07 2008
STATUS
approved