A136788 Triangle read by rows: A000012 * A107131.

1, 1, 1, 1, 2, 1, 1, 2, 4, 1, 1, 2, 6, 7, 1, 1, 2, 6, 17, 11, 1, 1, 2, 6, 22, 41, 16, 1, 1, 2, 6, 22, 76, 86, 22, 1, 1, 2, 6, 22, 90, 226, 162, 29, 1, 1, 2, 6, 22, 90, 352, 582, 281, 37, 1

Offset: 0

Author

Gary W. Adamson, Jan 21 2008

Keywords

• nonn
• tabl
• more

Comments

Row sums = A086615: (1, 2, 4, 8, 17, 38, ...).

A136787 = A107131 * A000012.

Examples

			First few rows of the triangle:
  1;
  1, 1;
  1, 2, 1;
  1, 2, 4,  1;
  1, 2, 6,  7,  1;
  1, 2, 6, 17, 11,  1;
  1, 2, 6, 22, 41, 16,  1;
  1, 2, 6, 22, 76, 86, 22, 1;
  ...
		

Crossrefs

Cf. A086615, A136787.

Formula

A000012 * A107131 as infinite lower triangular matrices.