OFFSET
1,1
COMMENTS
One more than the associated value in A046953. - R. J. Mathar, Jan 05 2011
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..1000
EXAMPLE
Distribution of the terms in the following triangular array:
*;
*,*;
*,7,*;
*,*,*,*;
*,*,14,*,*;
*,12,*,*,25,*;
*, *,*,*,*, *,*;
*,*,21,*,*,38,*,*;
*,17,*,*,36,*,*,55,*;
*,*, *,*,*, *,*,*, *,*;
*,*,28,*,*,51,*,*,74,*,*;
*,22,*,*,47,*,*,72,*,*,97,*; etc.
where * marks the non-integer values of (2*h*k + k + h + 4)/3 with h >= k >= 1. - Vincenzo Librandi, Jan 17 2013
MATHEMATICA
Select[Range[2, 200], !PrimeQ[6 # - 7] &] (* Vincenzo Librandi, Jan 12 2013 *)
PROG
(Magma) [n: n in [2..150] | not IsPrime(6*n - 7)]; // Vincenzo Librandi, Jan 12 2013
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Dec 21 2008
EXTENSIONS
More terms from Vladimir Joseph Stephan Orlovsky, Dec 23 2008
STATUS
approved