A140704 A051731^3 * A000012.

1, 4, 1, 4, 1, 1, 10, 4, 1, 1, 4, 1, 1, 1, 1, 16, 7, 4, 1, 1, 1, 4, 1, 1, 1, 1, 1, 1, 20, 10, 4, 4, 1, 1, 1, 1, 10, 4, 4, 1, 1, 1, 1, 1, 1, 16, 7, 4, 4, 4, 1, 1, 1, 1, 1, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 40, 22, 13, 7, 4, 4, 1, 1, 1, 1, 1, 1

Offset: 1

Author

Gary W. Adamson, May 24 2008

Keywords

• nonn
• tabl

Comments

Row sums = A007430: (1, 5, 6, 16, 8, 30, 10,...).

Left column = A007426: (1, 4, 4, 10, 4, 16, 4,...).

Examples

			First few rows of the triangle are:
1;
4, 1;
4, 1, 1;
10, 4, 1, 1;
4, 1, 1, 1, 1;
16, 7, 4, 1, 1, 1;
4, 1, 1, 1, 1, 1, 1;
20, 10, 4, 4, 1, 1, 1, 1;
10, 4, 4, 1, 1, 1, 1, 1, 1;
...
		

Crossrefs

Cf. A051731, A007430, A007426.

Formula

A051731^3 * A000012 as infinite lower triangular matrices, where A051731 = the inverse Mobius transform and A000012 an infinite lower triangular matrix with all 1's.