A132119 A002260 + A000027 - A000012 as infinite lower triangular matrices.

1, 3, 3, 6, 5, 6, 10, 8, 9, 10, 15, 12, 13, 14, 15, 21, 17, 18, 19, 20, 21, 28, 23, 24, 25, 26, 27, 28, 36, 30, 31, 32, 33, 34, 35, 36, 45, 38, 39, 40, 41, 42, 43, 44, 45, 55, 47, 48, 49, 50, 51, 52, 53, 54, 55

Offset: 1

Author

Gary W. Adamson, Aug 10 2007

Keywords

• nonn
• tabl

Comments

Row sums = A132127: (1, 6, 17, 37, 69, 116, ...).

Examples

			First few rows of the triangle:
   1;
   3,  3;
   6,  5,  6;
  10,  8,  9, 10;
  15, 12, 13, 14, 15;
  21, 17, 18, 19, 20, 21;
  ...
		

Crossrefs

Cf. A002260, A000027, A000012, A132127.