A134199 A002260 + A134082 - I as infinite lower triangular matrices; I = Identity matrix.

1, 3, 2, 1, 6, 3, 1, 2, 9, 4, 1, 2, 3, 12, 5, 1, 2, 3, 4, 15, 6, 1, 2, 3, 4, 5, 18, 7, 1, 2, 3, 4, 5, 6, 21, 8, 1, 2, 3, 4, 5, 6, 7, 24, 9, 1, 2, 3, 4, 5, 6, 7, 8, 27, 10

Offset: 0

Author

Gary W. Adamson, Oct 13 2007

Keywords

• nonn
• tabl

Comments

Row sums = A052905: (1, 5, 10, 16, 23, 31, 40, ...).

Examples

			First few rows of the triangle:
  1;
  3,  2;
  1,  6,  3;
  1,  2,  9,  4;
  1,  2,  3, 12,  5;
  1,  2,  3,  4, 15,  6;
  1,  2,  3,  4,  5, 18,  7;
  ...
		

Crossrefs

Cf. A002260, A134082, A052905.