A135152 A004736 + A128174 - I, I = Identity matrix.

1, 2, 1, 4, 2, 1, 4, 4, 2, 1, 6, 4, 4, 2, 1, 6, 6, 4, 4, 2, 1, 8, 6, 6, 4, 4, 2, 1, 8, 8, 6, 6, 4, 4, 2, 1, 10, 8, 8, 6, 6, 4, 4, 2, 1, 10, 10, 8, 8, 6, 6, 4, 4, 2, 1

Offset: 1

Author

Gary W. Adamson, Nov 21 2007

Keywords

• nonn
• tabl

Comments

Row sums = A047838: (1, 3, 7, 11, 17, 23, 31, 39, ...). The triangle is a companion to A135151.

Examples

			First few rows of the triangle:
  1;
  2, 1;
  4, 2, 1;
  4, 4, 2, 1;
  6, 4, 4, 2, 1;
  6, 6, 4, 4, 2, 1;
  8, 6, 6, 4, 4, 2, 1;
  ...
		

Crossrefs

Cf. A135151, A047838, A004736, A128174.

Formula

A004736 + A128174 - I, where I = Identity matrix, A004736 = (1; 2,1; 3,2,1; ...) and A128174 = (1; 0,1; 1,0,1; 0,1,0,1; ...).