OFFSET
1,3
COMMENTS
Complement of A224467.
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..1000
MATHEMATICA
Select[Range[0, 120], ! PrimeQ[27 # + 1]&]
PROG
(Magma) [n: n in [0..120] | not IsPrime(27*n + 1)];
CROSSREFS
KEYWORD
nonn,less,easy
AUTHOR
Vincenzo Librandi, Aug 21 2013
STATUS
approved