A115237 Matrix square of triangle A003983.

1, 2, 1, 4, 4, 1, 6, 8, 4, 1, 9, 14, 10, 4, 1, 12, 20, 18, 10, 4, 1, 16, 28, 29, 20, 10, 4, 1, 20, 36, 41, 33, 20, 10, 4, 1, 25, 46, 56, 50, 35, 20, 10, 4, 1, 30, 56, 71, 69, 54, 35, 20, 10, 4, 1, 36, 68, 89, 92, 78, 56, 35, 20, 10, 4, 1, 42, 80, 107, 116, 105, 82, 56, 35, 20, 10, 4, 1

Offset: 0

Author

Christian G. Bower, Jan 17 2006

Keywords

• nonn
• tabl

Examples

			1; 2,1; 4,4,1; 6,8,4,1; 9,14,10,4,1; ...
		

Crossrefs

Column 0: A002620(n+2). Row sums: A115238. Convergent of columns: A000292.