A134317 Triangle, A128174 * A134309 as infinite lower triangular matrices.

1, 0, 1, 1, 0, 2, 0, 1, 0, 4, 1, 0, 2, 0, 8, 0, 1, 0, 4, 0, 16, 1, 0, 2, 0, 8, 0, 32, 0, 1, 0, 4, 0, 16, 0, 64, 1, 0, 2, 0, 8, 0, 32, 0, 128, 0, 1, 0, 4, 0, 16, 0, 64, 0, 256

Offset: 1

Author

Gary W. Adamson, Oct 19 2007

Keywords

• nonn
• tabl
• easy

Comments

Is this the same as A123641? - R. J. Mathar, Mar 28 2012

Examples

			First few rows of the triangle are:
1;
0, 1;
1, 0, 2;
0, 1, 0, 4;
1, 0, 2, 0, 8;
0, 1, 0, 4, 0, 16;
1, 0, 2, 0, 8, 0, 32;
0, 1, 0, 4, 0, 16, 0, 64;
...
		

Crossrefs

Cf. A128174, A134309, A001045 (row sums).

Formula

T(n,k) = 0 if n+k odd, else T(n,1) =1, T(n,k)=2^(k-2) if k>=2. - R. J. Mathar, Sep 01 2024