A141210 Triangle read by rows, A140207^2.

1, 2, 1, 4, 3, 4, 7, 6, 10, 9, 12, 11, 20, 24, 25, 19, 18, 34, 45, 60, 49, 30, 29, 56, 78, 115, 126, 121, 45, 44, 86, 123, 190, 231, 286, 225, 67, 66, 130, 189, 300, 385, 528, 555, 484, 97, 96, 190, 279, 450, 595, 858, 1005, 1144, 900

Offset: 0

Author

Gary W. Adamson & Roger L. Bagula, Jun 13 2008

Keywords

• nonn
• tabl

Comments

Left border of the triangle = A000070; right border = A001255.

Examples

			First few rows of the triangle are:
1;
2, 1;
4, 3, 4;
7, 6, 10, 9;
12, 11, 20, 24, 25;
19, 18, 34, 45, 60, 49;
30, 29, 56, 78, 115, 126, 121;
...
		

Crossrefs

Cf. A001255, A141211 (row sums), A140207, A000070.

Formula

A140207^2 as an infinite lower triangular matrix.