A136581 Triangle read by rows: A136572 * A128174.

1, 0, 1, 2, 0, 2, 0, 6, 0, 6, 24, 0, 24, 0, 24, 0, 120, 0, 120, 0, 120, 720, 0, 720, 0, 720, 0, 720, 0, 5040, 0, 5040, 0, 5040, 0, 5040

Offset: 0

Author

Gary W. Adamson, Jan 09 2008

Keywords

• nonn
• tabl

Comments

Row sums = A052558: (1, 1, 4, 12, 72, 360, ...).

Examples

			First few rows of the triangle:
   1;
   0,   1;
   2,   0,   2;
   0,   6,   0,   6;
  24,   0,  24,   0,  24;
   0, 120,   0, 120,   0, 120;
  ...
		

Crossrefs

Cf. A000142, A052558, A128174, A136572.

Formula

A136572 * A128174 as infinite lower triangular matrices.