A143908 Eigentriangle by rows, n terms of (3 * A026150) followed by A026150(n).

1, 3, 1, 3, 3, 4, 3, 3, 12, 10, 3, 3, 12, 30, 28, 3, 3, 12, 30, 84, 76, 3, 3, 12, 30, 84, 228, 208, 3, 3, 12, 30, 84, 228, 624, 568, 3, 3, 12, 30, 84, 228, 624, 1704, 1552

Offset: 0

Author

Gary W. Adamson, Sep 06 2008

Keywords

• nonn
• tabl

Comments

Right border = A026150: (1, 1, 4, 10, 28, 76, 208, 568,...).

Row sums = (1, 4, 10, 28, 76,...) = INVERT transform of (1, 3, 3, 3,...).

Sum of n-th row terms = rightmost term of next row.

Examples

			First few rows of the triangle =
1;
3, 1;
3, 3, 4;
3, 3, 12, 10;
3, 3, 12, 30, 28;
3, 3, 12, 30, 84, 76;
3, 3, 12, 30, 84, 228, 208;
...
		

Crossrefs

A026150

Formula

Eigentriangle by rows, n terms of (3 * A026150) followed by A026150(n).