A107722 Matrix square of triangle A107721, read by rows.

1, 2, 1, 12, 4, 1, 114, 32, 6, 1, 1446, 364, 62, 8, 1, 22722, 5276, 854, 102, 10, 1, 424302, 92332, 14466, 1664, 152, 12, 1, 9168162, 1889012, 289222, 32536, 2874, 212, 14, 1, 224961774, 44207212, 6652522, 737472, 63886, 4564, 282, 16, 1, 6180211842

Offset: 0

Author

Paul D. Hanna, May 30 2005

Keywords

• nonn
• tabl

Comments

Matrix (2/3)-power of triangle A107717. SHIFT_LEFT of column 0 = 2*(column 1 of A107717). Matrix inverse is A107728.

Examples

			Triangle begins:
1;
2,1;
12,4,1;
114,32,6,1;
1446,364,62,8,1;
22722,5276,854,102,10,1;
424302,92332,14466,1664,152,12,1;
9168162,1889012,289222,32536,2874,212,14,1; ...
		

Crossrefs

Cf. A107717, A107721, A107728.

Programs

PARI