OFFSET
1,1
COMMENTS
Numbers n such that 2n+13 is not prime.
First column: A016777, second column: A016861, third column: A017029, fourth column: A017245. - Vincenzo Librandi, Nov 21 2012
LINKS
Vincenzo Librandi, Rows n = 1..100, flattened
EXAMPLE
Triangle begins:
-2;
1, 6;
4, 11, 18;
7, 16, 25, 34;
10, 21, 32, 43, 54;
13, 26, 39, 52, 65, 78;
16, 31, 46, 61, 76, 91, 106;
19, 36, 53, 70, 87, 104, 121, 138;
22, 41, 60, 79, 98, 117, 136, 155, 174;
25, 46, 67, 88, 109, 130, 151, 172, 193, 214; etc.
MATHEMATICA
t[n_, k_]:= 2 n*k + n + k - 6; Table[t[n, k], {n, 15}, {k, n}]//Flatten (* Vincenzo Librandi, Nov 21 2012 *)
PROG
(Magma) [2*n*k + n + k - 6: k in [1..n], n in [1..11]]; // Vincenzo Librandi, Nov 21 2012
CROSSREFS
KEYWORD
tabl,sign
AUTHOR
Vincenzo Librandi, Jan 24 2009
STATUS
approved