A158905 Triangle read by rows, A000012 * A158902.

1, 3, 1, 6, 1, 1, 11, 2, 1, 1, 16, 2, 1, 1, 1, 25, 3, 2, 1, 1, 1, 32, 3, 2, 1, 1, 1, 1, 44, 4, 2, 2, 1, 1, 1, 1, 55, 4, 3, 2, 1, 1, 1, 1, 1, 70, 5, 3, 2, 2, 1, 1, 1, 1, 1, 81, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 104, 6, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1

Offset: 1

Author

Gary W. Adamson & Mats Granvik, Mar 29 2009

Keywords

• nonn
• tabl

Comments

Row sums = A024916: (1, 4, 8, 15, 21, 33, 41,...).

Examples

			First few rows of the triangle =
1;
3, 1;
6, 1, 1;
11, 2, 1, 1;
16, 2, 1, 1, 1;
25, 3, 2, 1, 1, 1;
32, 3, 2, 1, 1, 1, 1;
44, 4, 2, 2, 1, 1, 1, 1;
55, 4, 3, 2, 1, 1, 1, 1, 1;
70, 5, 3, 2, 2, 1, 1, 1, 1, 1;
81, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1;
104, 6, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1;
117, 6, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1;
138, 7, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1;
...
		

Crossrefs

Cf. A158902, A024916

Formula

Triangle read by rows, A000012 * A158902; where the A000012 multiplier takes jcolumn sums of triangle A158902 starting from the top.