OFFSET
1,2
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..1000
EXAMPLE
Distribution of the terms in the following triangular array:
*;
0,*;
*,*,*;
*,*,3,*;
*,*,*,*,*;
*,*,*,*,8,*;
*,*,*,*,*,*,*;
*,*,*,*,*,*,15,*;
*,5,*,*,*,*,*,*,*;
3,*,*,*,*,*,*,*,24,*;
*,*,*,12,*,*,*,*,*,*,*;
*,*,10,*,*,*,*,*,*,*,35,*; etc.
where * marks the non-integer values of (2*h*k + k + h - 7)/8 with h >= k >= 1. - Vincenzo Librandi, Jan 15 2013
MATHEMATICA
Select[Range[0, 200], !PrimeQ[16 # + 15] &] (* Vincenzo Librandi, Jan 12 2013 *)
PROG
(Magma) [n: n in [0..150] | not IsPrime(16*n+15)]; // Vincenzo Librandi, Jan 12 2013
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Dec 22 2008
EXTENSIONS
0 added by Arkadiusz Wesolowski, Aug 03 2011
STATUS
approved