A142971 Triangle read by rows: A061397 with negative signs interleaved with (k-1) zeros.

0, -2, 0, -3, 0, 0, 0, -2, 0, 0, -5, 0, 0, 0, 0, 0, -3, -2, 0, 0, 0, -7, 0, 0, 0, 0, 0, 0, 0, 0, 0, -2, 0, 0, 0, 0, 0, 0, -3, 0, 0, 0, 0, 0, 0, 0, -5, 0, 0, -2, 0, 0, 0, 0, 0, -11, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -3, 0, -2, 0, 0, 0, 0, 0, 0, -13, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -7, 0, 0, 0, 0, -2, 0, 0, 0, 0, 0, 0, 0, 0, 0, -5, 0, -3, 0, 0, 0, 0, 0, 0, 0

Offset: 1

Author

Mats O. Granvik and Gary W. Adamson, Jul 14 2008

Keywords

• sign
• tabl

Comments

Except for the first term, row products are given by A062953.

Examples

			Table begins:
0;
-2, 0;
-3, 0, 0;
0,-2, 0, 0;
-5, 0, 0, 0, 0;
0,-3,-2, 0, 0, 0;
-7, 0, 0, 0, 0, 0, 0;
0, 0, 0,-2, 0, 0, 0, 0;
0, 0,-3, 0, 0, 0, 0, 0, 0;
		

Crossrefs

Cf. A061397, A062953, A008472.

Programs

Excel

=if(mod(row();column())=0;lookup(row()/column();A000027;-A061397);"")