OFFSET
1,2
COMMENTS
Complement of A110801 (12*n+1 is prime). [Klaus Brockhaus, Jan 02 2009]
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..1000
EXAMPLE
Triangle begins:
*;
*,2;
*,*,4;
*,*,*,*;
*,*,*,*,10;
*,*,*,*,*,14;
*,*,*,*,*,*,*:
*,7,*,*,*,*,*,24;
*,*,11,*,*,*,*,*,30;
where * marks the non-integer values of (2*h*k + k + h)/6 with h >= k >= 1.- Vincenzo Librandi, Jan 13 2013
MATHEMATICA
Select[Range[0, 200], !PrimeQ[12*# + 1] &] (* Vincenzo Librandi, Jan 13 2013 *)
PROG
(Magma) [ n: n in [0..120] | not IsPrime(12*n+1) ]; // Klaus Brockhaus, Jan 02 2009
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Dec 25 2008
EXTENSIONS
More terms from Klaus Brockhaus, Jan 02 2009
0 added by Arkadiusz Wesolowski, Aug 03 2011
STATUS
approved