OFFSET
1,1
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..1000
MATHEMATICA
Select[Range[2, 205], ! PrimeQ[6 # - 5] && PrimeQ[6 # - 1] &] (* _T. N. Noe_, Nov 09 2011 *)
PROG
(Magma) [ p div 6 +1: n in [4..204] | not IsPrime(p-4) and p mod 6 eq 5 where p is NthPrime(n) ]; // Bruno Berselli, Nov 09 2011
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Eleonora Echeverri-Toro, Nov 09 2011
STATUS
approved