A127778 Triangle T(n,k) = A002411(k) read by rows.

1, 1, 6, 1, 6, 18, 1, 6, 18, 40, 1, 6, 18, 40, 75, 1, 6, 18, 40, 75, 126, 1, 6, 18, 40, 75, 126, 196, 1, 6, 18, 40, 75, 126, 196, 288

Offset: 1

Author

Gary W. Adamson, Jan 28 2007

Keywords

• nonn
• easy
• tabl

Examples

			First few rows of the triangle are:
1;
1, 6;
1, 6, 18;
1, 6, 18, 40;
1, 6, 18, 40, 75;
...
		

Crossrefs

Cf. A002411, A001296 (row sums), A127773, A002260, A127777.

Formula

Equals the matrix product A002260 * A127773 as infinite lower triangular matrices.