A134446 A128174 * A002260.

1, 1, 2, 2, 2, 3, 2, 4, 3, 4, 3, 4, 6, 4, 5, 3, 6, 6, 8, 5, 6, 4, 6, 9, 8, 10, 6, 7, 4, 8, 9, 12, 10, 12, 7, 8, 5, 8, 12, 12, 15, 12, 14, 8, 9, 5, 10, 12, 16, 15, 18, 14, 16, 9, 10

Offset: 1

Author

Gary W. Adamson, Oct 25 2007

Keywords

• nonn
• tabl

Comments

Row sums = A002623: (1, 3, 7, 13, 22, 34, ...).

Examples

			First few rows of the triangle:
  1;
  1,  2;
  2,  2,  3;
  2,  4,  3,  4;
  3,  4,  6,  4,  5;
  3,  6,  6,  8,  5,  6;
  4,  6,  9,  8, 10,  6,  7;
  ...
		

Crossrefs

Cf. A002260, A128174, A002623.

Formula

A128174 * A002260 as infinite lower triangular matrices.