A130313 A000012 * A054523.

1, 2, 1, 4, 1, 1, 6, 2, 1, 1, 10, 2, 1, 1, 1, 12, 4, 2, 1, 1, 1, 18, 4, 2, 1, 1, 1, 1, 22, 6, 2, 2, 1, 1, 1, 1, 28, 6, 4, 2, 1, 1, 1, 1, 1, 32, 10, 4, 2, 2, 1, 1, 1, 1, 1

Offset: 1

Author

Gary W. Adamson, May 21 2007

Keywords

• nonn
• tabl

Comments

Row sums = the triangular series, A000217: (1, 3, 6, 10, ...).

Left column = A002088: (1, 2, 4, 6, 10, 12, 18, ...).

Examples

			First few rows of the triangle:
   1;
   2, 1;
   4, 1, 1;
   6, 2, 1, 1;
  10, 2, 1, 1, 1;
  12, 4, 2, 1, 1, 1;
  18, 4, 2, 1, 1, 1, 1;
  ...
		

Crossrefs

Cf. A000012, A054523, A000217.

Formula

A000012 * A054523 as infinite lower triangular matrices.