A133093 A007318 * A097806 * A133080.

1, 3, 1, 6, 3, 1, 10, 6, 5, 1, 15, 10, 15, 5, 1, 21, 15, 35, 15, 7, 1, 28, 21, 70, 35, 28, 7, 1, 36, 28, 126, 70, 84, 28, 9, 1, 45, 36, 210, 126, 210, 84, 45, 9, 1, 55, 45, 330, 210, 462, 210, 165, 45, 11, 1

Offset: 1

Author

Gary W. Adamson, Sep 09 2007

Keywords

• nonn
• tabl

Comments

Row sums = A033484: (1, 4, 10, 22, 46, 94, ...).

Examples

			First few rows of the triangle:
   1;
   3,  1;
   6,  3,  1;
  10,  6,  5,  1;
  15, 10, 15,  5,  1;
  21, 15, 35, 15,  7,  1;
  28, 21, 70, 35, 28,  7,  1;
  ...
		

Crossrefs

Cf. A133080, A097806, A033484. Duplicate of A131110.

Formula

A007318 * A097806 * A133080 as infinite lower triangular matrices.

Binomial transform of an infinite lower triangular matrix with (1,1,1,...) in the main diagonal, (2,1,2,1,...) in the subdiagonal and (1,0,1,0,...) in the subsubdiagonal.