A143119 Triangle read by rows, A051731 * A026741 * 0^(n-k), 1<=k<=n.

1, 1, 1, 1, 0, 3, 1, 1, 0, 2, 1, 0, 0, 0, 5, 1, 1, 3, 0, 0, 3, 1, 0, 0, 0, 0, 0, 7, 1, 1, 0, 2, 0, 0, 0, 4, 1, 0, 3, 0, 0, 0, 0, 0, 9, 1, 1, 0, 0, 5, 0, 0, 0, 0, 5, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 11, 1, 1, 3, 2, 0, 30, 0, 0, 0, 0, 6, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 13, 1, 1, 0, 0, 0, 0, 7, 0, 0, 0, 0, 0, 0, 7

Offset: 1

Author

Gary W. Adamson & Mats Granvik, Jul 26 2008

Keywords

• nonn
• tabl

Comments

Row sums = A002131: (1, 2, 4, 4, 6, 8, 8, 8, 13,...).

Examples

			First few rows of the triangle are:
1;
1, 1;
1, 0, 3;
1, 1, 0, 2;
1, 0, 0, 0, 5;
1, 1, 3, 0, 0, 3;
1, 0, 0, 0, 0, 0, 7;
1, 1, 0, 2, 0, 0, 0, 4;
...
		

Crossrefs

Cf. A026741, A002131.

Formula

Triangle read by rows, A051731 * A026741 * 0^(n-k), 1<=k<=n, where A026741 starts (1, 1, 3, 2, 5, 3, 7, 4, 9,...).