A127775 Triangle read by rows: row n consists of n-1 zeros followed by 2n-1.

1, 0, 3, 0, 0, 5, 0, 0, 0, 7, 0, 0, 0, 0, 9, 0, 0, 0, 0, 0, 11, 0, 0, 0, 0, 0, 0, 13, 0, 0, 0, 0, 0, 0, 0, 15, 0, 0, 0, 0, 0, 0, 0, 0, 17, 0, 0, 0, 0, 0, 0, 0, 0, 0, 19, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 21, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 23, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 25, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0

Offset: 1

Author

Gary W. Adamson, Jan 28 2007

Keywords

• nonn
• tabl

Comments

a(A000217(n)) = A005408(n-1), T(n,n) = 2*n - 1. - Reinhard Zumkeller, Feb 11 2007

Examples

			First few rows of the triangle are:
1;
0, 3;
0, 0, 5;
0, 0, 0, 7;
...
		

Crossrefs

Cf. A000217, A127648, A127773, A127774, A005408, A014480, A001787.

Formula

T(n,k) = (2*n - 1) * 0^(n - k), 1<=k<=n. - Reinhard Zumkeller, Feb 11 2007

Extensions

More terms from Reinhard Zumkeller, Feb 11 2007