A140583 Triangle read by rows, A140581 * A000012.

1, 2, 1, 3, 1, 1, 2, 2, 1, 1, 5, 1, 1, 1, 1, 1, 4, 2, 1, 1, 1, 7, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 1, 1, 1, 1, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 6, 2, 2, 2, 1, 1, 1, 1, 1, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1

Offset: 1

Author

Gary W. Adamson and Mats Granvik, May 17 2008

Keywords

• nonn
• tabl

Comments

Left column = A014963: (1, 2, 3, 2, 5, 1, 7, 2, 3, 1, 11, ...).

Row sums = A140584: (1, 3, 5, 6, 9, 10, 13, ...).

Examples

			First few rows of the triangle:
  1;
  2, 1;
  3, 1, 1;
  2, 2, 1, 1;
  5, 1, 1, 1, 1;
  1, 4, 2, 1, 1, 1;
  7, 1, 1, 1, 1, 1, 1;
  2, 2, 2, 2, 1, 1, 1, 1;
  3, 3, 3, 1, 1, 1, 1, 1, 1;
  1, 6, 2, 2, 2, 1, 1, 1, 1, 1;
  ...
		

Crossrefs

Cf. A014963, A140584, A140581.

Formula

Triangle read by rows, A140581 * A000012; where A000012 = the infinite lower triangular matrix with all 1's and the rest zeros: [1; 1,1; 1,1,1; ...].