A119974 Embed zeros in A119972, thereby creating a signed triangular matrix illustrating the pattern of negative values.

1, 2, -3, 4, 0, 5, 0, -6, 0, -7, 8, 0, 0, 0, 9, 0, 0, 10, 0, 0, -11, 0, -12, 0, 0, 0, 0, 13, 0, 0, 0, -14, 0, 0, 0, -15, 16, 0, 0, 0, 0, 0, 0, 0, 17, 0, 0, 0, 0, 18, 0, 0, 0, 0, -19, 0, 0, 20, 0, 0, 0, 0, 0, 0, 0, 21, 0, 0, 0, 0, 0, -22, 0, 0, 0, 0, 0, -23, 0, -24, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 25

Offset: 1

Author

Alford Arnold, Jun 06 2006

Keywords

• sign
• tabl

Examples

			Triangle begins
   1;
   2,  -3;
   4,   0,   5;
   0,  -6,   0,  -7;
   8,   0,   0,   0,   9;
   0,   0,  10,   0,   0, -11;
   0, -12,   0,   0,   0,   0,  13;
   0,   0,   0, -14,   0,   0,   0, -15;
  16,   0,   0,   0,   0,   0,   0,   0,  17;
   0,   0,   0,   0,  18,   0,   0,   0,   0, -19;
   0,   0,  20,   0,   0,   0,   0,   0,   0,   0,  21;
   0,   0,   0,   0,   0, -22,   0,   0,   0,   0,   0, -23;
   0, -24,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,  25;
  ...
		

Links

• Hakan Icoz, Table of n, a(n) for n = 1..1326 (rows 1..51).

Crossrefs

Cf. A119972.

Extensions

More terms from Hakan Icoz, Dec 25 2021