A155704 Triangle read by rows where T(m,n)=2*m*n + m + n + 10.

14, 17, 22, 20, 27, 34, 23, 32, 41, 50, 26, 37, 48, 59, 70, 29, 42, 55, 68, 81, 94, 32, 47, 62, 77, 92, 107, 122, 35, 52, 69, 86, 103, 120, 137, 154, 38, 57, 76, 95, 114, 133, 152, 171, 190, 41, 62, 83, 104, 125, 146, 167, 188, 209, 230, 44, 67, 90, 113, 136, 159, 182

Offset

1,1

Comments

The numbers 2*T(m,n)-19 = (2*m+1)*(2*n+1) are not prime.

First column: A016789, second column: A016873, third column: A017053, fourth column: A017221. - Vincenzo Librandi, Nov 20 2012

Links

Vincenzo Librandi, Rows n = 1..100, flattened

Example

Triangle begins:
14;
17, 22;
20, 27, 34;
23, 32, 41, 50;
26, 37, 48, 59, 70;
29, 42, 55, 68, 81, 94;
32, 47, 62, 77, 92, 107, 122;
35, 52, 69, 86, 103, 120, 137, 154;
38, 57, 76, 95, 114, 133, 152, 171, 190;
41, 62, 83, 104, 125, 146, 167, 188, 209, 230;

Mathematica

t[n_, k_]:=2 n*k + n + k +  10; Table[t[n, k], {n, 15}, {k, n}]//Flatten (* Vincenzo Librandi, Nov 20 2012 *)

Prog

(Magma) [2*n*k + n + k + 10: k in [1..n], n in [1..11]]; // Vincenzo Librandi, Nov 20 2012

Crossrefs

Cf. A153041, A016789, A016873, A017053, A017221.

Sequence in context: A243750 A046085 A054296 * A105189 A102816 A303305

Adjacent sequences: A155701 A155702 A155703 * A155705 A155706 A155707

Keyword

nonn,tabl,easy

Author

Vincenzo Librandi, Jan 25 2009

Status

approved