OFFSET
1,3
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..1000
MATHEMATICA
Select[Range[0, 2800], !PrimeQ[13 # + 8] &] (* Vincenzo Librandi, Ocy 15 2012 *)
PROG
(Magma) [n: n in [0..90] |not IsPrime(13*n + 8)]; // Vincenzo Librandi, Oct 15 2012
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Jan 31 2009
STATUS
approved