A127780 A127775 * A002260 as infinite lower triangular matrices.

1, 3, 6, 5, 10, 15, 7, 14, 21, 28, 9, 18, 27, 36, 45, 11, 22, 33, 44, 55, 66, 13, 26, 39, 52, 65, 78, 91, 15, 30, 45, 60, 75, 90, 105, 120

Offset: 1

Author

Gary W. Adamson, Jan 28 2007

Keywords

• nonn
• tabl

Comments

Odd number transform of A002260.

Row sums = A002414: (1, 9, 30, 70, 135, ...).

Examples

			First few rows of the triangle:
   1;
   3,  6;
   5, 10, 15;
   7, 14, 21, 28;
   9, 18, 27, 36, 45;
  11, 22, 33, 44, 55, 66;
  ...
		

Crossrefs

Cf. A127775, A002260, A002414.