OFFSET
1,1
COMMENTS
For numbers k for which (8+k!)/8 is prime see A151913.
The next term (a(11)) has 174 digits. - Harvey P. Dale, May 10 2016
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..11
FORMULA
MATHEMATICA
a = {}; Do[If[PrimeQ[(n! + 8)/8], AppendTo[a, (n! + 8)/8]], {n, 1, 50}]; a
Select[(8+Range[50]!)/8, PrimeQ] (* Harvey P. Dale, May 10 2016 *)
PROG
(PARI) for(k=4, 1e3, if(ispseudoprime(t=k!/8+1), print1(t", "))) \\ Charles R Greathouse IV, Jul 15 2011
CROSSREFS
KEYWORD
nonn
AUTHOR
Artur Jasinski, Apr 07 2008
EXTENSIONS
Corrected link to sequence of indexes. - Serge Batalov, Feb 17 2015
a(10) from Harvey P. Dale, May 10 2016
STATUS
approved